You want someplace with the infrastructure to support lots of people (or a few people for a long time), but little local population to compete for those resources. National parks are generally well stocked, with water and lodging to support peak tourist season, but at least in the western US, most are pretty far from major metropolitan areas.
Grand Canyon and Yellowstone have a lot to offer in a zombie apocalypse.
You want someplace with the infrastructure to support lots of people (or a few people for a long time), but little local population to compete for those resources. National parks are generally well stocked, with water and lodging to support peak tourist season, but at least in the western US, most are pretty far from major metropolitan areas.
Grand Canyon and Yellowstone have a lot to offer in a zombie apocalypse.
local boyscout camps are good options too. usually have self-sufficient plumbing of some kind, mess halls, etc.