For the upcoming race season, I will be purchasing a race trailer! As fun as it is to camp,, the truck needs to earn its keep as a tow vehicle as well, so today I added a brake controller. The cubby worked out perfect for my trailer brake controller install, keeping it accessible but out of the way.
I went with a Prodigy P2 proportional unit. These are great, as they use an inertial sensor to adjust the trailer braking power based on how hard you're stopping. An added bonus is the brakes are not fighting you in reverse if you lightly tap the pedal.
You can also set a boost function to have the trailer brakes come on first, to help in a sway event.