I'm picking up a Viking pop-up truck camper in the next couple of days. Need to get it ready for a trip in July to the mountains where I will not have shore power to plug into. I know a generator will...
Yes, the 4-pin is for camper chassis light only, not any interior lights.
Is there a camper house battery? There should be one and a separate charge line for it. I would not recommend running the house appliance solely from the truck battery, else you drain it and end up not being able to start the vehicle.
In my opinion, get a small quiet generator like the Honda EU series and plan your camping trip.