Fireball - any problem with running a small genny at camp? Many uses, that's for sure.
No problem other than the use of gasoline and potential for theft. If I ran an electric heater off the generator it would undoubtedly be better than the 50% efficiency of a furnace, and quieter, and have the added benefit of dry heat rather than wet propane heat.
It would be nice to leave a heater on when I'm out hunting to keep the trailer from freezing, and in that case I wouldn't want to run a generator and leave it unattended. Too many thieves anymore.