DISH offers twice the chance of having a clear shot from a given location over DIRECT. DISH programming is available from two different directions, one in the SW sky ( Western arc) and the other in the SE (Eastern arc) sky. The same 3 LNB antenna can be used to access programming from either direction. The Western Arc satellites are at 110, 119 and 129 orbital locations. The Eastern Arc satellites are at 61.5, 72.7 and 77 orbital location.
The arc that is installed at a home location is normally based on where a customer's HD locals are uplinked and their location relative to the Mississippi River.. Some local markets upload HD locals to both arcs (mine are that way). SD Locals are available from both arcs.
So, with DISH, when I get to a camping location, I look to see which Arc offers the best shot from TWO choices (DIRECT only offers one choice) adjust my antenna for the one that offers the best shot, and use that one. Few campers know about this. When I use the Eastern arc, I frequently have helpful folks try to tell me that my antenna is pointing in the wrong direction and it tilted the wrong way.