Grand Design Momentum 394M
I have a Grand Design Momentum 394M and haul 2 Spyders in the garage. I drive in an F3S and back in an RT. The trick to getting the low front on the ramp is to go at an angle, get one front tire on the ramp, quickly turn the handle bars, and drive up the ramp. I am able to load when the trailer is level and hooked up to my truck. If you can't get up the ramp try to raise the front of the trailer to get the ramp at less of an angle.