In the off season you can easily go more than 100 mi between gas stations that are open either due to time of year or time of day. You'll be fine but it's comforting to have 50-100 mi of gas with you. I used a can on the last trip up with the gasser pickup. Wasn't quite sure if I'd make it to the next station until I dropped 5 gal in the tank. At 8.5 mpg it didn't help much but it was enough.
Plus you could do some pretty good bartering if you come across someone out of gas!