I'm trying to compile a list of the towns where the resupply options are very limited, and thus having a box shipped to you is encouraged. Here are the cities i have written down on my list so far. Feel free to add more, or tell me that some of these towns are actually fine to resupply for food in.
Fontana Dam
Port Clinton, PA
Bear Mtn, NY
Delaware Water Gap
Harpers Ferry, WV
Glencliff, NH