Shopping for a 3/4 ton truck when you expect to carry a camper would be a very bad decision.  The difference between a 3/4 ton truck and a 1 ton SRW is minimal but the difference in payload capacity is not.
Pick your camper first and then pick a truck that has 1000 lbs of payload remaining with the camper installed.  You will use that 1000 lbs for clothing, food, water, and other necessaries.  Buying a truck with 2400 lbs of payload for a 2700 pound camper, especially when buying a truck is a $60,000 decision, should be obvious to you as a bad decision.