You might want to consider how each camper is constructed.
Since you are asking for advice I am happy to give my opinion.
1.) your truck does not have 5,300 lbs of payload. You need to figure out how much payload you actually have, total truck weight with fuel, people, stuff, etc. minus what the total GVW is, it's likely 12,000 lbs or less so subtract truck total weight from that.
2.) get the lightest northernlight or bigfoot you can find. Northernlite has a sportsman addition that seems to be light or the bigfoot 1500 model. All other campers besides those are essentially built the same, stables and wood with rubber roofs i.e they fall apart offroad.
3.) also consider the cirrus, they seem to be doing things differently and worth a look, I also like the idea of the Aldea system.
4.) go heavy on good batteries and lots of solar, no stupid "solar kits" those ar worthless. Having power and heat it sounds like will provide you with the most comfort.
5.) skip the cassette toilet ( i have one, it sucks, but barely better than a traditional toilet) instead ditch the RV crapper and go compost toilet. You can use these in the winter.
7.) Find out what tires you have. I like tall and skinny. 285/75/18 has 4000 lbs of capacity a tire. I used 295/70/18 Cooper Stt Maxx tires and got 55K (US) miles out of them that included 3 trips off road in Baja, 2 trips all over mexico, belize and guatemala.
8.) carry a small portable lightweight generator, I had a yamaha and now a Honda 2000, The honda is better. When SHTF you have back up, I see having it as a matter of safety. You can always to use "run the genni" worst comes to worse. They are light, quit, and if you find a good way to transport it, could be lifesaving.
