Cabover Camper on half ton truck towing a boat

So I have been looking at cab over campers because I have become addicted to taking my boat camping. I currently have a 2015 Toyota Tundra double cab with the short bed. I believe its a traditional 6 1/2ft bed and I tow my 2005 Sanger V215 so its not the heaviest of wake boats. I am curious if anyone else on here does a cab over camper and tows a boat? I am trying to figure out how these cab over campers advertise for half ton trucks. I am looking at a 2017 Lance 825 with a dry weight of 1800lbs. It gets advertised as built for half ton short beds like my tundra but the max payload capacity is around 1600lbs. I know you need to add air bags for one but that doesn't change the GVWR. I am seeing people running campers on their half ton like this and trying to figure out what the tricks are. I am concerned about putting 1800lbs in the bed and then hooking up the boat and adding its tongue weight. I really don't want to trade trucks right now because the tundra is paid for and a new 3/4 ton is crazy expensive. Even with the 3/4 ton truck the weights can still be an issue.