Downshifting fix for hills

I know what OP is talking about. He's not talking about setting cruise climbing a mountain. Here in MD there are spots on 70 nowhere near the mountains - even toward Columbia that have hills that are just steep enough to prompt a downshift to one, sometimes 2 gears. The only solution I found is let the motor wind up or turn off the cruise. I am sure the V-10 can handle it but it's LOUD and sounds like it will fly apart. I turn off the cruise and take the hill manually. Usually only drops about 3-5 MPH. The problem, as someone has mentioned before, is that the mph drops slightly at the bottom of the hill and then cruise has to work harder to catch back up to the programmed speed. I have heard 5 star helps, but I'd be curious to know how much. Realistically you are in an RV pulling a car. How much do you expect cruise and the engine to do with or without 5 star? It's not going to behave like a car. You have to determine how much you want to ask from your engine and tranny. I prefer to take it a little easier.