Replace or add a reverse lockout solenoid to your surge brake actuator from Dexter or Tie Down Engineering to keep the actuator from activating your trailer brakes when you shift into reverse.
The sales associate I spoke with was very, very helpful. I know very little about cars/trucks and, in my opinion, he went above and beyond to help me determine what I needed to buy! Thank-you so much for your help and especially for your speedy shipment! : I will definitely buy from this company again.