I have a small (18 ft) Terry Resort trailer, it's nothing fancy a 1988 but in good shape. I picked it up in California, combining a visit with a friend and getting this trailer. I had it loaded wro...
About 15% of the weight of the loaded trailer needs to be tongue weight. So load some heavy stuff as far forward as you can then take the trailer for a drive. If it's not loaded correctly it won't tow correctly.
Sway control is not the answer, tongue weight is the answer. Sway control is the "just in case something goes wrong" backup plan.