"Rent an outdoor chemical toilet, i.e. PortaJohn and contract to have it pumped out regularly. Construction sites and major outdoor events use them all the time."

Not in a disaster situation, I'll bet, and maybe not soon after, until things settle down to normal.

On hiring a septic tank service after a disaster: get your neighborhood together and have a single large pickup. And from personal experience, they can empty it from buckets and garbage cans, but not from bags.

Sue