Welcome to the Forum. I found nothing if you signature giving any information on what you have. This makes it a bit difficult to give advice.
Having a 2 wheel drive can give you more options on TCs, as it pertains to weight. Also worthy of note is your attitude toward the numbers on your door sticker. If you prefer to not exceed them that will impact your load capacity greatly. If you are willing to upgrade your truck, that too can impact your TC choices. Without a signature stating what you have, your question is wide open.
Which truck campers you should consider is not a real valid question. Most manufactures have a model for any application. I suggest you complete your signature, state if you do or do not want a slide, how big (length) of a TC you want, and if you are or are not willing to go outside the numbers on your door decal.
Personally, with the exception of the tires, I ignore the door decal. I am of the belief the tires and wheels are the major limiting factor on load capacities of a given truck. I base this on about 34 years of TC experience with several trucks and TCs. Other than tire failure, I have never had a problem with any of my setups.
I have had my present truck and TC since 2004, and have had no issues related to weight or length of my TC. I have a 1996 Dodge DSL, 2WD with a 4200 pound Bigfoot TC. My total weight (truck/TC) fully loaded is 10,400 lbs.
Wayne
2004.5 Ram SLT LB 3500 DRW Quad Cab 4x4
1988 Bigfoot (C11.5) TC (1900# w/standard equip. per decal), 130 watts solar, 100 AH AGM, Polar Cub A/C, EU2000i Honda
Toad: 91 Zuke