I too live close to the finger lakes area. You would like the area if you have not been there before.
There is a Wine event on Seneca Lake in June (5,6,9)
There is a six hour race at the track the end of June (28,29,30) We camp at the racetrack when we go to the reces. The race track is about 5 miles out of the town.
If you go to Watkins Glen State park the size of your unit may make it difficult to get into. We have a 34' fifth wheel and I no longer camp there - just too hard to park it. Your camping pass will get you into any of the state parks during your stay. So - - you could stay at any of the State Parks around Watkins Glen and make a day trip over to Watkins Glen to do the gorge walk and checkout the town.
We stay at Sampson State Park, Keuka Lake State Park or Cayuga State Park because it is easier to get our RV into and if it is hot (80s or 90s) out we can run the AC.
All of the sites at Sampson have 30 amp service boxes, about 1/3 of Keuka have 30 amp service boxes and Cayuga has an area of about 50 campsites that have 30 amp service boxes.
All reservations for NY state parks is through: http://www.reserveamerica.com
Let me know through a PM if you want more info on the parks and area.
2017 Keystone Avalanche 320RS
TV - 2011 Chevy Silverado 3500HD LTZ CCLB Duramax SRW 4X4