first off, don't go by dry weight, use the trailer gvwr. it'll never be the dry weight once you have all your gear in it.
as far as 2500 and weights, you need to check payload rating of whatever truck you have and see.
diesel powered 2500s usually have pretty low payload ratings due to the heavier drive train. you'd need to take your loaded, ready to camp pin weight, plus weight of all cargo in the truck plus passengers weight, weight of the 5th wheel hitch in the bed, add all those and see if you are over the payload for your truck.
I don't recommend exceeding the payload rating, personally which is why I upgraded to a 2500hd truck. everyone is different.
the trucks from 13 or 14 on up (can't remember which) have the same frames, axles, brakes, etc. 2500 or 3500. only difference is rear springs on 3500 are leafs and not coils.
as such, if I were to consider overloading a 2500 series truck (i wouldn't), I think I'd want a 13/14 and newer truck for the above reasons. in the newer 2500s they have artificially low gvwr so they can stay at 10k gvwr rating, typical of that series truck. good luck