Now that the Black Run has friends, all you need to do is park off Kettle Run Rd. Pick a color or two, or three, and go for a ride. The best Fat Bike riding is in Aero Haven, on the other side of Bortons Rd. Aero Haven is part of the BRP.
I'd love to, but I won't be available those days. There is a map at the trailhead showing the marked trails. There's also singletrack that isn't marked. It's tough to get lost as most unmarked trails loop or just dead end. And if you have a fat bike, I agree the old airport area is a must ride. Have fun.