we used one the other weekend in the mountains of NC. 
We used a dual LNB and hooked two campers with home sets to see DirectTV.
We just aimed based on the permanently mounted ones around us in the permanent sites. We got our BASIC DirectTV with what each of has as our packages at home. I had my local channels and all the others. I had to change my set up from SWM, multiport 32" dish that I use at home for HD and all the other stuff. To use an 18" dish I have to take the multiport out then reselect my set as an 18" dish. Programming  is the same as home except I don't have FULL HD.
Most of the time with us being on the east coast the angle is almost so close we don't adjust it, we just have to turn VERY, very slowly to catch the dish. never had a problem but I also keep my extra receiver on full time for an extra $6 a month, but I have the cable ran to the camper as it rest's under its shelter. So anytime I am at home I can turn tv on see DirectTV.
randy