I second Sampson State Park. Very centrally located for all Finger Lakes activities. Your entrance ticket for Sampson will give you day use of all the state parks in the region during its valid dates. Directly across the road from Sampson is the defunct Seneca Army Depot and its famed White Deer can often be seen grazing the fenceline along 96A.
Watkins Glen is about 40 minutes south of Sampson. Don't miss Captain Bills dinner cruise on Seneca Lake. Food is average but the cruise is excellent.
30 Minutes SE of Sampson is Taughannock State Park featuring the highest vertical falls east of the Mississippi. 15 minutes S on rt. 96 is the city of Ithaca home of Cornell U with numerous trails and waterfalls. (If you are a people watcher,an afternoon on the Ithaca Commons will provide you with a lifetime of fodder to chuckle about) Ithaca has numerous restaurants spanning the entire spectrum of dining experiences.
Finger Lakes National Forest is on the ridge between Seneca and Cayuga. The roads in the Forest are town roads all of them are great bicycling. They are all signed as Seasonal no Maintenance Nov-May but are very passable with a 2wd high clearance(anything but a car) vehicle except a few spots after a period of heavy rain.
Of course there is the Wine trail and also a cheese trail with a couple of distilleries and craft beer venues thrown in.
In this area exploring the back roads is stress free,we have a large non tourist oriented Amish population and horse powered agriculture is always on display.
Please come see us,we can use your money!