I have a 100ft 14 gauge extension cord I use at home. Walmart sells a small 15 amp to 30 amp adapter. You should be OK to run everything except high current loads (A/C unit or electric heater on high)
While your at Walmart, get a 50amp to 30amp adapter also - I occasionally use this at parks or campgrounds when the 30 amp plug on the pedestal is flaky. I get my adapter and plug into the 50 amp plug.
When using adapters and extension cords, periodically inspect them for discoloration (running hot). I put my hand around the connectors and plugs, if they fell warm or hot, its normally a bad connection and time to replace them.
2001 Coachmen Mirada (Ford F53 6.8L V10) - Toad 2001 Civic
It won't do MACH 2, but I can get a sandwich and take a pee.