Tuscan suggestions please.

The Arezzo city center is pretty flat. In Siena there's a tough uphill climb from the bus stop to the city center but the city center is relatively flat, bur not as flat as Arezzo. I would stay in Siena.

Siena would be my vote also. It’s gorgeous. There’s lots to see and do there, and it’s well-positioned for day trips. The buses go all over the place from the Piazza Antonio Gramsci (hint: a small kiosk in the middle lets you underground to the bus ticket office).

Thank you.

I was concerned about the tough uphill climb from the bus stop in Sienna.

What about the train station? Is there also an uphill climb?

Are taxis are lined up at both the bus and train station?

As we travel so far and for so long we have suitcases that we don't want to drag uphill.

From the train station in Siena there are a series of long escalators that take you to the top where the city center is. The bus drops you off near the center and it isn’t too hilly there.

From the Siena train station, there’s a hard-to-find bus stop, where a bus takes you into the center, and the station’s taxi queue was long, because there were no taxis coming or going. The Rick Steves guidebook didn’t provide a clear description how to get to that underground bus stop, and asking around wasn’t helpful, but we eventually located an unmarked lift in the shopping mall across from the train station that took us down to the level with the bus stop. Rick described it as “dreary,” but didn’t mention that it was busy, with people crowding the curb where buses stopped, even when it wasn’t their bus. We managed to get thru the pack of bystanders and onto the bus, which then sped up towards the town center, whipping around sharp curves. We were standing in the vestibule by the rear door, as all seats were full. It was tough hanging onto our rolling suitcases whilst also trying to hang onto the bus handle and not fall over. The bus was like an amusement park ride in some ways, but it did drop us off at a perfect spot. Leaving Sienna later in the week, taxis were in the center, and one provided a much easier ride back down, than the bus was to ride up. Between Siena and Lucca, the former is a bigger city, with more “big” sights.

We’ve been mostly staying in Airbnb’s lately, but used actual B&B’s for both Sienna and Lucca that trip.

Lucca is a smaller, more intimate place to visit, and was flat in town. In October, streets were packed on Friday night and during the days in the weekend. Most people with bicycles walked them on interior streets. The paved pathway/driveway ring atop the walls was pretty flat, although it narrowed in some places, and was pretty full with others walking or pedaling, including families in huge “rickshaws,” not necessarily sleeping to their side of the path, or watching for oncoming bikes or pedestrians. It was a bit chaotic at times.

A wonderful bike ride just outside of town was along the the Fiume Serchio river, north of the walled city.

I took the bus from Arezzo to Siena and the bus stop (not a station) I got off in Siena was by Porta Oville and that was a tough climb to the Siena center. When I left Siena by bus for San Gimignano I took the bus from Piazza Gramsci and this piazza is pretty much the same level as the rest of Siena (so no climb).
The bus stop by Piazza Gramsci is much busier than the bus stop by Porta Oville.

In reference to the last comment, the Arezzo bus stops at Porta Ovile but goes all the way to Piazza Gramsci.

If you don’t drive then Siena is a good base to visit the quaint ancient towns in the Siena province, of which there are many.

Arezzo is not as hilly as Siena, and is reasonably flat, but as you approach the Duomo, Il Prato and Piazza Grande, the Main Street called “Corso Italia” or just “il Corso” starts to climb up.

Arezzo would work for visiting the quaint ancient towns in the Arezzo province. The most famous is Cortona (reachable by bus or train to Camucia then short bus), but also worthy of a visit are: Anghiari, Poppi (train) and Casentino Valley, Lucignano, Castiglion del Lago (by train), just to name a few. Florence is only 35 to 75 min away by train (depending on type of train) and many aretini commute to Florence, therefore it would work also for a day trip to Florence.

Just to be clear, you can get off the bus at the Piazza Gramsci, which, as others have mentioned, is central and fairly level with other notable sights in town. Also, if you’re walking around and encounter really steep hills, there's often an alternative way to circle around that’s not nearly as steep.

Thank you both for the detailed information I appreciate it.

We spent a few days in Montecatini, which is a little big town, not as big as Florence but has two train stations and is flat and walkable. We had a car, and it was easy for us to drive to towns in Tuscany and also to La Spezia for Cinque Terre day.

Thank you, Montecatini looks stunning.

Arezzo was on my short list for my stay next Fall...I have been there for the antique market (1st sunday of every month...it's HUGE and fun). Anyway, I remember it being pretty flat.... my preference for walking as well. Since I wanted to be fairly close to Florence for day trips to friends etc. I decided to stay again in Pistoia...close to Florence...close to Lucca and the beach as well as Arezzo to go back to the Antique market. the entire town is very flat! and the apartment/condo has an elevator which is a great plus as is the air conditioning (unlikely I'll need that in the Fall but was extremely necessary last summer). Have also been to Siena and believe that it is pretty flat...it was faster to take the train from Florence than the train which seemed odd at the time. I wasn't too impressed with Montecatini...to get to the more picturesque area is quite a hike from the train station to the funicular that will take you up to that part of the town. Wherever you end up I'm sure you will have a great time...enjoy!

Still working on our trip and very much appreciate the Tuscany suggestions.

I note Salerno is mentioned frequently in RS threads. It looks like our sort of town, to incorporate with Naples. I’ve never considered Salerno as a place to stay. We enjoy coastal towns.

Has anyone taken a bus from Salerno to Minori, Maiori. We loved these towns, particularly Maiori. Our experience with buses on the AC last time was terrible. I note there’s a ferry, but we’ll be there in March so even if ferries operate in March it will be weather dependent. A taxi could be well priced.

On our last trip to the AC we stayed in Ravello and Furore and drove everywhere. We didn’t much enjoy Amalfi Town or Positano, we loved Ravello, Furore and others.

Has anyone experienced travelling by bus or ferry in March from Salerno to other AC towns/villages?

Airbnb's seem well priced in Salerno.