Dilemma - how much time to spend in Provence.

Are eight more days in Provence worth it? I’m inclined to say yes, of course. I would add another night or two to Aix. Five nights in Avignon is a lot honestly. I did not care for the city, and there’s not much to see there. If you’re using it as a base for Arles, Nimes, or L'Isle-sur-la-Sorgue then ok, but I found Arles a lot more interesting. You might consider splitting/adding nights in Arles.

I would readily suggest Vaison-La-Romaine for a few nights. Great little town, with very good and sizable Roman ruins and characteristic stony old town. A stop at the Roman theater in Orange is a must.

Look out for market days wherever you are and plan around them. Personally, a good market is almost a day of sightseeing, and they all have their own personalities.

Is that an extra eight days worth? I’m not 100% sure. Perhaps a few nights in Carcasonne or Albi would be a nice addition, and easy enough by train.

P.S. - You’re always offering terrific advice on this forum, so I hope this was mildly helpful!

Montpellier? Narbonne? The Yellow Train from Villefranche-de-Conflent to La Seu d'Urgell (a detour from the main rail line)?

I really liked Toulouse with a side trip to Albi, but that's also a detour.

I do like Zaragoza.

Thanks to you both for taking the time to advise me. After looking into your suggestions and doing more research, I've decided to postpone the visit until next year. It's a combination of feeling too much pressure to arrange this in the short time available to me and concern that November may be a suboptimal time for Provence. I have filed everything away and will pull it out in a couple months to plan a much better trip.

It is true that November weather is not always the best. Unpredictable but intense rain spells can be rather frequent, especially later in the month.
April's great, in my opinion.