Oldcar, I don't recall the height of mine, but I built a metal carport for it and used 11' high side tubes. That gives plenty of room for my top (with A/C) when it's raised and I could even pull the trailer out with the top up.
If I were to do it over, I think I'd make the sides 10' high, and I'd still be able to put the top up, but it would be "tight" and I might have to adjust the longitudinal position of the trailer if I were to raise it, so that the A/C would clear the roof crossbars. My trailer is also about 2" higher than stock after having the axle moved forward and down (to give a bit more ground clearance).
The standard roof height when towing our trailers is 6'. I don't think the top goes up more than about 4'.
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew