I'll just chime in about what I used. When I was a newbie starting out I just went for the same o same o standard Brake Buddy. It works fine BUT......
After going full time and hooking up and unhooking more often now that I was on the road full time, it got REAL old getting on my knees to shove that brake buddy in and hook the brake clamp on, etc etc.
I had a Tracker also and they are small and low to the ground. Which makes it literally a pain to put the Brake buddy in and out.
I highly suggest you take the suggestions from the forum members that have the different types of brake assist that is inline with the tow bar. Trust me you won't be sorry.