What are hte specs for a 2500 06 Mega Cab? I have a 1500 but research says they are the same?

Also, I am thinking some day a 5th wheel travel Trailer and a possible car hauler option. I know the Hemi is not the best for Towing, but what about installing a 5th wheel hitch? Is it worth it on my truck or do I need to look at a 3500 some Day?

Also someday I will have 2 crawler jeeps, I know the 3500 can easily pull 2 jeeps ona large flat bed 5th wheel, can my truck do it on occasion? Or will 2 jeep on a propperly balanced trailer be too much?