>>1071322Colorado, outside of a major city.
Low population areas with natural water supplies will naturally lend themselves to longer self-sustainability.
This can depend on your SHTF scenario though. If there's a prolonged period of time without food truck deliveries most places will simply collapse as their populations do some combination of starve, flee, and pillage. The places where the climate and environment is such that hunting is a feasible means to feed oneself year round would likely see their large game hunted to extinction within a few years. Depends on if there's enough military/police/fed/gov still active and stable enough to dedicate time and manpower to managing wildlife. No DNR in the woods or punishments for poaching will mean more hunting and fishing by the local population. That's just the way it is.
Localized agriculture when you can't guarantee regular outside deliveries of gas or supplies has a somewhat limited maximum yield without significant management and oversight as well. Again, depends on your flavor of SHTF and how long it lasts and what else is going on in the region, but basically anywhere with less people and more natural resources is obviously a safer choice.
Seriously, being stuck in Vegas when you learn that there haven't been deliveries of fuel or food in over 48 hours is a nightmare scenario.