I (and several others I know of) use Hopper & Joeys in our RVs. I highly recommend them because most times you can use existing RV coax to hook up the Joey receivers and they provide a Whole House DVR.
I'm surprised to hear this. I have a hopper at my house and they had to change my wiring to a newer cable for my joeys to connect consistently. I am interested in this though. How much extra is it to run? is it just $7 for the hopper and $7 per joey? I was looking at the 722k and using a coax out to the bedroom, but if I need 2 coax's from the dish I don't want to do that.