Well i store all my stuff uner the platform or on the roof rack. I have a flip up section that stores my sleeping bag and sleeping pad. The first night of a trip i have to role out a sleeping pad and sleeping bag. I geuss that is not zero time. Maybe 30 seconds or 1 min? After that on a multi day trip often i jusy let it stay out during the day while driving. If it bothers me sliding around i lift open the hatch and just jam it down inside.
Let me also explain some. I forget that some people use platforms that involve folding seats. I have no back seat and use a permanent full lenth sleeping platform with storage under it. The truck carries just me or me and my wife. So it works out great.
I do the same thing. I have a sleeping platform I built onto my custom drawer system. I bought a matress at iKEA that fits like a glove and is very comfortable - like a real bed. I make the bed before I leave and when I arrive, I just clean up and crawl into the bed. I remake the bed every morning and go wheeling / hunting. Nothing moves around.
I am thinking about getting a RTT because it is a bit of a hassle getting in and out of the back of the truck and I am getting older. I typically just crawl in through one of the back doors. I am looking at getting a roof rack to store extra items on long hunting trips or a roof top tent and storing items inside the truck. The RTT will afford more room to move around while sleeping and a easier time getting in and out (like when you have to go in the middle of the night). If I leave the back seats folded down under the sleeping platform the room behind the front seats is as large as a pickup truck bed and will hold plenty of gear.
My only reservation with a RTT is sleeping in it when there is lightening. I have slept inside the truck in heavy rain, snow and sleet with no with little concern because of the faraday cage the vehicle body represents. While I have slept several times in a ground tent with lightening while hiking in wilderness areas, I remain conscious of the dangers it presents.
How to RTT owners feel about sleeping in the RTT when there is lightening?