5th wheel or MH ? help

Yes, you would need a genny for boondocking to recharge your batteries for the heater or run an AC. We don't usually camp where we need an AC, except that once. Even with our solar system, we heat with a large Heater Buddy to preserve the battery power for other things. Depends on how late in the fall and how cold it gets and what you prefer. Even with camping in the Rockies in the late fall, we still run our propane Heater Buddy when we're up and when we go to bed, we turn it off, set the thermostat to 40 and double up on bedding. First one up in the morning turns on the Heater Buddy and turns off the onboard heater because it sucks up battery power. The solar panels charge the batteries back up.

My understanding is that FW's don't automatically come with generators, but are an add on. At least when we purchased ours that's how it worked. Could be today's new ones come with them, I don't know.