Jerry, according to my google study, it seems 86/17 is a might lite on westbound services near Binghamton*.
The best I could come up with is Manley's Mighty Mart at 53 Downs Ave Binghamton, NY
From 86 / 17 West
Take Airport Road / County Rd exit
Manley's Mighty Mart is on the right
http://www.manleysmm.com/Looks like food, gas, & restrooms should be available
(Hopefully not in that order...)
See you around 13:00.

As you know, you gotta whole lotta miles to run by 13:00 (425 or so) so if you get delayed, don't sweat it for our sake & come along easy, and plan B might be indicated - Get off 390 at exit 4. On your left will be a gas station. Call me from the gas station and me or someone who can hopefully emulate at least partial sobriety will come out and show you the last mile or two to the campground. First time trying to find the place can be an adventure, especially after a 550 mile ride.

*I have a hard time reading or hearing the word "Binghamton" without thinking of:

Phun Phacts Rally Style:
The campground was built by the CCC. The stonework there is awesome.
There are acoupla beautiful waterfalls on site.
There are no flying bugs there. Nada, nuh-uh, nuttin. I can;t explain it, but it's true. No skeeters, flies, noseeums, nuttin.
I don't even bother to bring bug spray - don't need it.
The fee to camp there is two fitty, as in ($2.50) per night. Pretty durned cheap.