Considering tc that weighs roughly 3800 dry. Would a 1 ton single rear axle be okay or do I need to look at double axle only. Please, no truck brand wars. Stick to axles. Thanks.
Regardless of whether the "dry" weight is a base camper, camper with options, it is still going to be well over 4000lbs loaded and ready to camp. Plus passengers.
4000lbs is my personal cutoff where I, under no circumstances, would recommend anything less than a dually. Under 4000lbs you can fudge the numbers and bolt on widgets and doodads and make it work, but there's a diminishing return on that as you get heavier, and need more and more addons.