Hello!
My husband and I spent a week in Bolzano in mid-October 2018, and then a couple of nights in Verona. Bolzano was one of our favorite places ever, to the point that we felt we could live there, not that we have that choice.
What made Bolzano so great for us was not strictly the town itself, which is interesting enough, but it offers so many things very close by that we thoroughly enjoyed. While it is South Tyrol, it doesn't feel Tyrolean to me in the way Innsbruck does. The language in the city is Italian, the food is more German. We didn't find the food the best of both worlds, perhaps because we were usually dragging ourselves back to the city after a full day, and just took what we could find open. (Restaurants start closing up at 8 p.m.) Our go-to was take-out from an Italian gourmet deli near our AirBnb.
It is a shame you are not hikers, as the nearby Seiser Alm is a wonderful day trip. Still, you might consider taking the stunning bus ride to Ortisei, a charming town full of wood carvings (visit the church.) You can then take the cable car up to the Seiser Alm, and even without hiking you can stroll around and enjoy wonderful views. German is spoken in the small towns.
The Ötzi museum is fascinating, don't miss it. We also enjoyed Runkelstein Castle with its murals, and walked back into town through the vineyards. Bolzano is a great place if you enjoy wine. We did a bike trip on the Weinstrasse one day, and it was beautiful, although I didn't enjoy sharing a road with cars on the way back. But there are many good wineries in the area to try in easier ways.
My favorite weekend ever was a Saturday evening at the Traminer Wein gassl, wine tasting of Gewürztraminer in a little alley in Tramin (Termeno), complete with food, music and dancing. We followed that with the Merano grape festival parade on Sunday afternoon, as gorgeous a day as you could hope for. Sip wines while enjoying costumes, marching bands and lavish floats. It was fairly (and understandably) crowded, but we didn't run into any other Americans. The parade was followed by a concert in the Kurhaus by the Bolzano community band and then a passagieto around the beautiful town. I think these events will be the weekend before you could be there, but this area offers cultural festivals and events almost every weekend, check event calendars for south Tyrol.
Verona is completely Italian with some hills but no mountains, a completely different experience. Pretty touristy, but we had a couple of outstanding dinners, and not expensive. It's longer by train from Bolzano than I expected.
Just a note, we went to Venice the last week of October. After a month of perfect weather, we were struck with record high waters in Venice, and at the same time there was flooding in northern Italy. We took a direct EC train from Venice to Munich, except in this case we were unloaded onto a bus for a stretch because some of tracks were washed out. But that's another story...
Have a wonderful trip!