Jim
We have trailered our 22 with a EZ loader with single axle, surge brakes, galvanized and a weight rating of 3750 lbs for 32,000 miles, which included two trips to Alaska and one to Prince Rupert, BC, from Wyoming. No problems with swaying or other concerns at higher speed, but it just makes sense that a tandem axle should be even better. A single axle for sure has a much rougher ride. They are less expensive and should be worth considering if your travels are mostly over smooth roads. Would absolutely not recommend it for someone who might have plans for an Alaska trip or the equivalent. Along with the single axle making for a rough ride, the 3750 weight rating is to lite if really loaded heavy like we are on our long trips.
Our trailer is equipped with rollers and would prefer bunks especially after this years trip in which we had two roller support arms break. Rough roads, max weight, single axle with rollers is a recipe for trouble. Before another trip north we will be replacing ours with a tandem axle with bunks like Rick and Don are using.
Agree a hand winch is fine and I wouldn't suggest going under 4000 lbs capacity with 4500 lbs being better.
Jay