Hello! I have not had any experience with ancestry tour companies you mention, but I have spent quite some time traveling solo around the Silesia region of Poland, including Wrocław, which is my favourite Polish region and city! A lot of those small towns around Silesia are quite well preserved thanks to the Polish government. Both Krakow and Wrocław have excellent Christmas Markets in December
As you may know, Katowice (just west of Krakow) was the industrial and economic capital of the historic Silesia region, I suggest a few nights there, especially as they have a brand new modern museum of the Silesian people/culture/history, all the exhibits are in Polish, German, and English. You can read more here - https://www.inyourpocket.com/katowice/silesian-museum_137651v
Here are some of my trip reports + photos of my travels in the area:
https://community.ricksteves.com/travel-forum/trip-reports/krakow-daytrip-report-underrated-upper-silesia
https://community.ricksteves.com/travel-forum/general-europe/vicarious-travel-poland-2017-wroclaw-silesia