I have 4 wheel open trailer (Trailerex) with inoperative surge brake system. I tow FF so my package is 1800 behind Acura MDX. My concern is that I don't have trailer brakes and the danger this presents. I am considering installing new brake system and am choosing between trailer surge brakes or proportional electric brake system. I would prefer electric brake controller to be on trailer with nothing installer under dash of tow vehicle. Comments appreciated........