Knot Flying
I am not a trailer expert but I can tell you of my experience getting a trailer for my 22' Angler last fall.
The " Outboard Motor Shop " in Oakland, Ca. supplied me with a Pacific bunk type trailer model # G21TW-4-5
This model is a tandem axel unit with surge actuated disc brakes on one axel. Laws differ from state to state on brake regulations so you should check that out. Bunks are good. Tandem axels are good for the highway but harder to handle on your pad or ramp. I am happy with the tandem's handling and the security of four wheels on the road.
My trailer has 10' long bunk type loading guides that I think are good to have.
You can check out more details of that trailer on the Pacific trailer site.
My trip home in December was 1650 miles and no trouble at all.
That is a good start
Ed