Not to discourage you but coming from someone who is not a "weight cop", your options with that truck are limited to zero.
If it's the 5' short bed, I'd say don't even bother looking for a slide in. 6.5' short bed helps a little, but even the lightest pop up campers will require some real suspension mods and you'll still be way over gvw.
Bottom line with the added tongue weight and towing, you don't have many options. I'm not well read on pop up campers but that's where you should concentrate your search.
You really need more truck to haul a TC.
You haven't provided much info, but if by chance you have a max tow/haul package then you may be able to handle a very light hard side but I don't think you can get the 7 lug HD suspension in a crew cab. Only seen them in ext cab trucks.