Your estimated weight of 3000 to 4000 is about 1000 pounds optimistic.
Forget the manufacturers empty weight label, the truth is always a lot more.
You’ve certainly got a truck capable of hauling whatever camper you want.
If you get or make a long enough cord you can just plug into your 7-pin trailer plug.
Campers usually have their connector on the forward driver side corner, so an outlet in the bed up forward like 5th wheel haulers use is nice but not absolutely necessary.
You can always just drive it with whatever camper you buy and see what it needs.
Some trucks don’t need anything, my old ‘80s Chevy duallies never needed any help at all.
If it sags, airbags or overloads.... if it sways, sway bar. If it drives great, camp on!
