Just the M35A2, M105 trailer, with ATV.
Have a diesel genset onboard but would prefer to pay for an RV hookup, as the set is as noisy as all getout for those outside the shelter!
BTW - pay heed to a possible RV power situation:
Do we know what kind of outlets they have? It could be "house plugs" or, the 120VAC/30A NEMA TT-30 that most RVs use. These look like 240V outlets but they are not. An adapter can be bought for about $10 to adapt this to a regular 120VAC/15A house plug.
Some RV hookups offering 50A service may have either of the 120/240V 30 or 50A sockets. I carry a voltmeter and clamp on ammeter. Should be easy to get everyone hooked up.