+1 on Watkins Glen State Park, especially in good weather. Plan at least 1h, better 1.5hs, depending how much you want to walk. Entrance is right off RT. 14 on left shortly after you get into town, ~5 min from the track.
If you are willing to make a slight detour, I can recommend the museum of glass in Corning (where I live):
Corning Museum of Glass
Or if you plan to go to Ithaca, there is this:
https://www.priweb.org/ ,pretty neat as well.
As for a shop in case of a problem, here is where I take my car:
Corning Imported Auto - Used Cars - Corning NY Dealer
They service lots of Porsches, BMWs, Audis, ..
For more severe stuff I go here, but this is in Rochester:
Eksten Autoworks Import Auto Repair Service and Race Car Preparation. Porsche, BMW Specialists.
They prepare many track cars, Eksten Sen. (and Jun.) sometimes show up at events to support customers.
I will also be at the track for this event, but only on Friday and as a guest - I somehow lost my luster for DE events end of last year and now race karts ...
But I will stop by and have dinner with a friend of mine. If you are interested, send or PM me you car number, and I will stop by on Friday.