My '11 TG has NEVER popped the breaker while using Reverse. As I said in another post, I backed my TG & pop-up camper up the ramp of my enclosed trailer the day I bought it and others have said that they also have no or little problems with popping the breaker, I guess some of us just got lucky. Also, during my riding season the TG is backed into my enclosed trailer every time it comes home.
I think the easy thing for AZTriGlide to do is for her to just try backing into her trailer and see what happens, but just in case learn ahead of time where & how about the breaker. We can only hope that she joins the LUCKY group.