I bet you could get at least one kayak -maybe two - up there. The thing for me is, I have the Leer 180 camper shell on there. It rises about 4 inches higher than the cab. On top of that is the rack, which is another 4 to 6 inches higher still. So, I'm getting into "needing a ladder" territory if I want to add a RTT and then put kayaks on top of all that. So for me, personally, it doesnt work. Since I have the camper shell to begin with, I already have a nice, safe, secure place to sleep and have no need for the RTT.