I would look at a light weight pop up like a Four Wheel or ATC. I think Four Wheel Camper builds a hard side but don't know the weight. Probably be lighter than the Lance 650.
There is a guy who lives 30 minutes from me that has a newer short bed, 1/2, 6.5 bed, Chevy Z71 with a new 2017 Lance 650. He had the Lance for sale a few months ago. It still is sitting next to his shop off his truck and sitting next to it is a brand new 2018 travel trailer. He must not have his truck setup right or he feels the Lance is too big for his truck. His 1/2 ton looks like it will handle his new travel trailer. I think he did his home work on the travel trailer :B