5th wheel is a no go in a half ton. Ford has a heavy duty payload package that ends up in a tiny amount of their trucks that lets the manufactures say “half ton towable” but that’s a BS phrase.
Travel Trailer that weighs more than 7500 or a fifth wheel pushes the dodge firmly into 3/4 ton and 1 ton SRW range. The payload just isn’t there.
Your truck has a payload sticker of 1541 pounds. No one goes camping by themselves so let’s say you have 350 pounds for a driver and passenger and you add a sliding 5th wheel hitch and rails that’s another 100. So with nothing else in the truck that didn’t ship from the factory you have 1091 pounds of payload left. So with the published pin weight you are already 231 pounds over the GVWR of the truck.
Then you have to remember that that pin rating from the brochure is dry, and may not include the same options in the trailer you pick. Real world weight with some propane, water, options, and stuff in the camper and you just went from being 231 pounds over to 700+ pounds over your GVWR and you are now over the rear axle weight.
If you want a 5th wheel get a 3/4 ton gasser or 1 ton diesel.