I've toured the area several times & have used Tomkins Co. Regional Airport long-term parking. It won't be free but it is secure. That is a few miles north of Ithaca proper on the east side of the lake. There is beautiful country on the east side & you could cut over to Seneca Falls very easily. It's in general pretty hard to go wrong in the area, either hugging the lake or going inland through the farm country. Geneva offers several places to stay, some fairly upscale. Hammondsport is a pretty little village with a motel right on the lake, several B&Bs, and a nice tavern/restaurant right on the village green. Be aware that in general to travel east/west will almost definitely mean HILLS, especially at the southern ends of the lakes; going north/south less so. Ithaca itself has some very steep hills. Wineries abound along most of the lake shores. There is a road on the west side of Keuka Lake, 54A I think, way up on the ridge overlooking the lake with gorgeous views if you are willing to climb up there. The Finger Lakes Cycling Club has many cue sheets/maps on their website which I'm sure you would find helpful. Have a blast!