Great minds...! I built a “fun sized” (yes, I’m stealing your phraseology) rack over my 8 ft truck bed trailer. Built to be an over topper rack (just have not acquired the right topper yet) that extends to the front of the truck cab (trailer tongue).
It started life as a contractor rack, but now it holds my rtt (Smittybilt Overlander XL) that is set up to open to the rear of the trailer/annex off the back. I thought about having the entire tent (when open) be supported by the rack, but opted to let it hang over so I could use the annex. That leaves me about 10ft (of the 14ft) deck for low profile box storage for travel as well as an elevated patio of sorts when in camp.
I went ahead and welded in an expanded metal deck, removeable guard rails, and even a take down tube steel roof /awning up there that can be covered with a tarp for additional shade if camping in the desert or high country with little cover.
I hung another awning w/tent (Rhino-Rack) off the passenger side of the trailer and had enough room on the rack (forward of the awning) to build a portable shower/bathroom into a rifle case. The original plan was to mount a road shower style tank on the rack above the shower stall, but that is still in design phase. For now an Ivation shower that pumps water from a 5gal kettle I boil water in, is what I’m using. I can also use that set up to wash dishes when cooking so I may just stay with that for a while, while searching for a suitable tank to build into a solar water tank.
I built a 180 batwing awning off the rack on the driver side of the trailer that I am working on getting a tarp made for. It runs the 8 ft length of the bed and opens 8 ft in both directions as well as 8ft out. I May eventually have the walls made for it to provide even more respit area to escape the merciless Sun or rain of the High Desert areas we like to roam about in Idaho.
I like having options. The large sturdy roof rack over the truck bed trailer allows lots of deployment options, depending on the location, group size (mostly family), or need for space out of the elements (hunting, fishing, camping, etc).
My wife thinks I’m nuts, building my “Jed-Glampit” monstrosity, but I can, so I do. And no one that jokes and kids me about it complains too much when the inevitable rain comes while we are out and there is PLENTY of covered space to hang out and be comfortable at base camp in. Plus I can detach the truck and go chase critters or sight see or trail run and come back to camp and usually a well made and appreciated dinner in camp (since someone always wants to stay in camp and relax and/or keep an eye on things) at least in our group...
So “go big...” be creative as you build your rack and build up your rig. Adventures await and are much more fun when you and your crew (wife, kids, etc) are dry and comfortable. I can always only deploy what is needed and don’t always deploy everything, but in another life I learned a couple things regarding gear... “I’d rather have it and not need it than need it and not have it” and “Why go Alpine when you can Assault the mountain”.
Im still learning to travel light...the struggle IS real!