Well, you've gotten some good advice on ATC / FWC camper models, so I won't say much other than we've enjoyed 10 years with a first gen Tundra/Hawk combination visiting places we never would have camped otherwise.
Suspension mods start with E rated tires. If you don't have them, you'll want the beefier sidewalls, and ability to air down (carry a compressor). Tires take the most abuse, so you want the best you can afford. Don't forget the spare.
Airbags are commonly added to level the truck and help control the load. They have the ability to adjust, if you're planning on taking the camper off. Other brands like Timbrens and Summo Springs don't need to be aired up, and they have many fans.
Alternately, a number of folks have had custom leaf springs installed. I believe one company is called Deaver.
I have found a rear sway bar to be very helpful to control side to side rolling action. Once bolted on, they just do their job without maintenance. I used the Hellwig brand and have found them to be great, although the bar is the lowest point of unwanted contact if I'm straddling rough terrain.
Shocks are a whole other subject, but maybe yours will do the job. I have the Bilstein 5200's.
I should also mention maintenance on the earlier Tundras has caused me to replace front sway bar links and bushings.
Probably your biggest issue is the 8' bed, since your truck really doesn't have the load capacity for an 8' camper.
My Tundra has the 6'4" bed. My comments are based on using the truck/camper on rougher trails and gravel roads, plus highway miles.
Edited by Lighthawk, 29 July 2021 - 08:57 PM.
2021 RAM 3500 Crew 4x4, 6.4 hemi/8 speed trans with 4.10 gears, Timber Grove bags, Falken Wildpeak 35" tires.
OEV Aluma 6.75 flatbed, Bundutec Odyssey camper on order for 2024
For this year we're still using our 2008 FWC Hawk with victron DC-DC charger, 130w solar, MPPT controler
with 2000w inverter and external 120v output and 12v solar input with 100w portable solar. http://lighthawkphoto.com