I am retiring in a few months and next year going on an extended RV trip for months. My Diesel Pusher has a King Dome (15 in I think) installed. I have DirecTV coverage at home now, which of the 2 services Dish or Direct offers the most reliable coverage for an RV? I may keep my DirecTV, or switch to Dish if they perform better with a smaller system like this. We will be in the NW, and east coast from Tn. north to Canada. We are in Alaska this dish is way too small to work well up here.