IIRC, Ridgeline manual says WD is "not recommended" but the reasons it gives have nothing to do with receiver attachment or structural integrity; nor is WD forbidden, just "not recommended." But really, the up-down chucking at the ball is not bad unless you're on a bad highway like with constant, uneven expansion joints.
I prefer single axle to tandem. Worst chucking I ever felt was with a rented tandem u-haul trailer! But the big reason is my experience with tires; seemed like the front tire would throw highway-litter nails or screws into perfect position for the rear tires to be stabbed. I have about 1/5 as many punctures now with single axle trailers.
Big thing to check, though, is the load carrying capacity of a single axle TT. Some of them only allow 400, 500, maybe 800 lbs of cargo. That isn't much when you figure what water, battery, and LP weigh. Also, if the TT is 19' or longer, and if it's really low to the ground, the rear can drag when you go into a gas station or some similar place with a rise or dip; flipping the axle can sometimes be a remedy for these.
Mike G.
Liberty is meaningless where the right to utter one's thoughts and opinions has ceased to exist. That, of all rights, is the dread of tyrants. --Frederick Douglass
photo: Yosemite Valley view from Taft Point
