Carrying a camper and towing your trailer is 4.10 gear territory.
By the time you re-gear your truck and buy a Superhitch and a shortbed type camper with a slide-out, you'll be a lot of $$ into it.
You really have the wrong truck, I'd sooner sell/trade into a long bed with lower gears.
Then you have a large selection of older affordable campers (a shortbed with slide is going to be pretty new and very expensive) and if you stay with the same 8 or 9 foot length you were already considering, you wouldn't need the Superhitch. It would handle it all better too.
I know, you run what you've got... another possibility is a redneck toy hauler, that's a big enough trailer to put a camper on the front and your Jeep on the back.
But you still have those tall gears.