[AZ Traveler]

My last rig had dual 27 12v deep cycle batteries. I had all LED lights but a couple hours of TV off an inverter and running the heater blower at night would bring the battery charge down to 60-70% level in one day. If you run the batteries way down (not good for your batteries), hooking up to the truck will give you plenty of power to get the slides in and hooked up. Assuming your truck has a heavy duty charging system it will bring your batteries up fairly well after a short 3-4 hour drive. You can stay fairly warm at night with an extra blanket.