I towed a 5th with my last 2500, haven't yet with new 2500. Night and day over TT, easier to park, turn, and just more useful with the space under the bedroom. First thing is to get your exact payload from the numbers in your door jamb or enter your VIN in the online tool. A 2500 Power Wagon has a drastically lower payload capacity than a stock Tradesman 2500, for example.
Do you have long bed? If not, I highly recommend a slider hitch due to the uneven and tight turns I have seen people attempt while dry camping in the boondocks. On pavement a non-slider could be okay but with your use, why chance it.
Also, consider your wet weight when calculating your maximum trailer. You might be adding power cells, solar panels, of course fluids and the like to ensure you have the necessities for dry camping. A very fluid average of a 5th wheel weight transfer to the truck is about 15% of the trailer weight. But the more you put in front storage and in front of axles converts to more on truck. Don't try to overbalance with putting most weight behind trailer axle as you could have your rig wagging down the road or sag the rear end of the trailer so bad you drag it all over.
I recommend you get your 5th wheel hitch installed, load truck up with gear, people, fuel, etc. and get your front and rear axles weighed. This will help you know exactly how much payload you have left for the trailer and will be invaluable as you search. Good luck.