The Stay-in-Play system is great. However, if your RV is a diesel and new enough that it needs DEF, then the Stay-in-Play is not really suitable.
Feds started requiring diesel rigs to have the brakes lights come on whenever the exhaust brake, or engine brake, is applied. Unfortunately, that signals the Stay-in-Play to activate. However, the Stay-in-Play also requires a certain amount of braking force to activate.
Since I already had the Stay-in-Play, I've set it so that we have to be braking heavily.