Just another perspective-I've had my boat on a 48 roller Venture Trailer for four years and have never had a single problem loading or unloading my boat, which I fully expected to after moving up from a little 17 foot aquasport. I trailer it alone quite often and I can't believe how perfecly the boat loads up every time I come in. I know, I'm sure I just jinxed myself for this spring.
The boat also seems very well supported on this rig.