If you plan on dunking that trailer in sal****er, you'd better hope it
has hydraulic brakes.

I see your point of not wanting to mix electricity with water.

One of the local trailer dealers here told me people were buying
undersized trailers to avoid the brake requirement.

This sounds odd. Having a brake in the trailer should help the
stopping power and is a good thing, right? Why would anyone want to
avoid having a brake system if the towing load demands its use? People
must have been buying undersized trailers because of the low price, not
because their being brakeless.

Jay Chan