BEFORE you buy the truck, ask to see the payload specification on that specific model. Payload represents the total amount of weight the truck can carry (vertical load). When you add the pin weight spec of the 5th wheel, plus the 800-900# that Don mentioned, plus the weight of the hitch, bed liner, bed cover, tools and other junk in the bed, passengers, etc., you'll almost certainly overload a 3/4 ton truck. When you look at the 3500 which will have higher payload, you still have to get the spec. On single rear-wheel 3500 models, Dodge has in the past skimped on the components that contribute to higher payloads. I almost bought a 2010 Dodge 3500 SRW until I saw the spec. It was over 1000# less than I needed and was only 200# more than the 2500. Ford and Chevy both had way higher payload specs. Maybe they've stopped doing this, but the last thing you want to do is buy a new truck and trailer and find out you're overloaded. Especially since you can avoid the problem by checking the spec before buying.