Most of the 'brake-in-a-box' systems are pretty easy to install. Depending on the model, they may have a box which connects to the brake switch to signal the unit into the coach that the brake system is working. Road Master Even Brake is an example. Some of the models are easier to install, but still require you to wire in a break-away switch if the toad becomes disconnected from the coach.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX