Not sure of laws and permits available in TX, so this idea might not be an option. In WI we can apply for a permit that allows us to tow two trailers. The first trailer being towed must be a camper with brakes, the second trailer can be used for hauling a boat, atv, or anything recreational use .... except livestock or horses. The permit here in WI is only $25 for three months, a bit more for additional months. If possible to do this in TX, then the only thing you will have to do once at camp is unhook the boat trailer, park the camper, and hook the boat trailer back up again and go launch the boat. Your truck should have plenty of tow power to handle towing both trailers with no problems. If that is not an option in TX, I can see raising and lowering the boat to fish becoming very tiresome.
clarkbre mentioned a toyhauler style of camper. Some are very nice and should fit your needs well to haul the boat safely. Once the boat is out of the storage spot in the hauler, you can make that into a guest bedroom or even a living room type of thing. It is an option that might be worth checking into.
I have seen people cartopping when towing trailers here in WI, so it is not uncommon.
Matt