Our first camper was a 1987 single axle 15' Layton. It came with electric brakes and the hitch had both weight distribution (wd) and sway control. Even with the tongue weight properly loaded the wd seemed extraneous until I traveled without it one time and discovered an unexpected value. The tow vehicle had a fairly short wheel base which probably approximated the distance of the drive axle to the trailer axle. At some point the expansion joints set up an harmonic that was quite unpleasant and unrolled both the paper towels and toilet paper in the trailer. Merely having a slight amount of tension on the arms would have prevented the oscillations and improved the travel.
Determining if yours has electric brakes is simple enough,the wheels attach to a plate or a drum, nothing behind the mount,no brake, drum is the mount there are brakes.
Good luck