1. Realtor
2. 3/4 ton to 1 ton depending on camper weight
3. see #2
I have a 2016 F-250 4x4 with the gasoline 6.2L v8 with a 6 speed auto. The engine power is fine for pulling a loaded trailer while in camper mode. Just expect to slow down a bit on steep grades. The squat is where I have to be concerned. My camper is about 2000lbs wet. The truck bed drops about 5 inches when I put the camper on the bed. Biggest thing I have hauled was a 6x12 wood deck single axle utility trailer with a 1300lb. side-x-side and it sags another couple inches. The bump stops for my suspension were about 3 inches from touching the leaf springs. Not sure of the trailer tongue weight with that setup, but that was the max of my comfort level.
I have a LivinLite CampLite 6.8 model. Has a shower, toilet, stove, microwave, fridge, gas heater, & rooftop AC. The freshwater tank is only 13 gallons but I manage. And when it's installed on the truck bed, it leaves the receiver hitch unobstructed.