7ft should be 6.5+door, like he said you could ratchet it down or probably just leave some heavy crap in it, coolers, bait tanks what ever. my rhino was a little bigger than the door of my old one too, but with me in it and normal quad box in the back it cleared by a couple inches
as far a ramp vs door, obviously the ramp if you are parked with the back high on a ramp its not, but i would still have the ease of not messing with ramps, taller trailers are better this way or you can get a spring axle trailer, most of them are axle over and you can just flip it and it makes alot more difference than you would think. also nice to have jacks on the back anyway so if you need more you can jack it up higher. dont like the torsion ones seem too bouncy too me. they sit real low too
did the spring flip on my old camper, wife didnt like it but the thing rubbed the bumpers everywhere and didnt after.