small generator and wiring question

I have been helping my son and his friends build a camp/shack for them to hang out in. We currently have it wired to a 12volt deep cycle battery with a invertor to power a few lights and a fan. We have been looking at the small portable 2000 wattish generators as the next step. Should i just extend the wires i have to the invertor (14/2 I believe) outside to the generator? or should i wire up a small breaker panel and have the generator power that? i know the generator has circuit breakers built in but i didn't know if i needed an additional small panel. the biggest load would someday be a small maybe 10,000 btu ac unit.