Letchworth State Park, NY- site recommendations ???

I'm much smaller than you (20' TT), but here is what I do when looking for a new site. First get on line with the registration site, in this case www.reserveamerica.com, and check the sites by size. When you find a possible site I switch to Google Maps and zoom in on the site, if you are lucky and on a PC you might be able to walk the access roads. At last visit only loop 800 had this option in Letchworth SP.

We have reservations for Memorial weekend for the hot air balloon festival and Columbus day for a 3 day craft show. Both weekends have been booked solid 9 mo in advance. So I would advise making your reservations ASAP.