Here is what Steve and I have been working on. We are still working a few bugs out of it but its almost there and already is a blast to camp in. The tent platform is mounted directly to the frame rather than the lid. I didn't want to have to raise the weight of the tent along with the lid.
On top of it our tent has an annex and we have an awning mounted as you can see below. Both would both pretty much be useless (at least for me at 6'3", the wife at 4'11" wouldn't have a problem) mounted at that low of a position. I didn't want the platform permanently mounted at a height that works well for the annex, awning, and lid opening since it would be so high in the air towing it would be terrible, so we worked on a design that is adjustable in height. I also wanted to ensure that it could be used in both the upper and lower positions. Using 2 linear actuators with 24" extension in opposite diagonal corners and the other 2 corners assisted with gas springs the entire platform can raise/lower with the push of a button. Currently I'm powering the actuators utilizing the 12V power through the 7 pin trailer connector since I don't have on board power yet.
We have a CVT Mt Adams mounted on the trailer and love it. We opted to use high lift jacks for stabilizer jacks, I would rather carry equipment that serves multiple purposes than carry 2 other jacks that only really serve 1 purpose, plus I always carry 1 with me, what's 1 more? I have to say the trailer tows like a dream, quiet, smooth, you would forget it's back there unless you look for it.
I'm thinking we should get the other few bugs worked out over the next couple of weeks.