Two years ago I started with this same post. I got a lesson here! And I needed it.
I have Direct TV at home. I have a portable dish, this one:
DIRECTV SWiM HDTV Satellite Dish Tripod Kit for RV / Mobile / Portable - Installer Oasis
Tried to locate satellites, had no luck. Got a DISH account and an automatic Pathway X2. Pathway works. Either me or DISH are idiots (or both) and they kept cancelling my account, so I sold that stuff out of total frustration and am back on the Portable tripod dish and taking a Direct receiver from home. I WILL HAVE to learn how to point it better, many do it well.
I could get an automatic pointing dish for Direct TV..........but it would NOT be HD. I can't live without HD. So I'm spoiled, sorry. Only DISH has automatic dish plus HD on it.
If you have DISH at home, stay with it. Get any automatic pointing dish and go!
If you have DIRECT at home, like me, try the tripod and learn how to point it first. The Winegard Travl'r is an expensive option but automatic..........but questions remain as to how portable it is.....Winegard says none, but some have done it. It is the only automatic pointing dish that gets HD from Direct TV.
One note: 93.3298% of the time you will have to run a coax directly from the physical dish/tripod/whichever, straight to the receiver. You can't go through the trailer, unless manufacturers have figured this out and bypassed the 'switch' by now. I used a short 'flat coax' through the window. Youd think TT manufacturers by now would make a very simple, through the wall, short coax connection with F connectors on each end, but of course they have no clue. Neither does any dealer in America (IMHO).