Hensley/Propride experience in snow or ice

I have towed enclosed snowmobile trailers in all kinds of conditions. I believe that any kind of sway control will hurt as much as help because it depends on the traction of the trailer tires to pull things back in line. An active sway control will try to prevent turning even if that is what you want to do. A friction control will try to keep the combination in the same condition till traction is regained.

Trailer drum brakes are a joke under any conditions, you should consider disk brakes and have them controlled with foot pressure because controllers that use inertia for reference have no ability to function when on slippery surfaces.