randye,
You should be able to get about 2 days with out recharging your batteries. Of course it all depends on what else you are running.
Check with your neighbors to see if someone has a generator they can loan you. Or go down and buy a Honda or Yamaha generator.
Charging the battery with the trailer hookup can take forever. It really is only a trickle charge type process. Ask me how I know.
HamRad