We have DirecTV at home and have had it for about 5 years. What I do is take my 3 receivers from home and put them in the coach. At the same time, we suspend our service at home so we are not paying for both (I think you can suspend for up to 6 months, but check with them).
If we are going to spend the winter in one place, I call DirecTV and set up new service at that location. Last winter, we were spending 3 months at one resort and the tech came out and set up the oval HD antenna (we do not have a roof top dish). We used our home receivers, but they will bring you new if you want. Since that was considered a new service, it included local channels plus free NFL Season Pass and 3 months of HBO and Cinimax.
When we spend several months travelling around to different locations, We call DirecTV and FAX in the paperwork for DNS (Distant Network Service). This service (Often used by over the road truckers), gives you all the Premier, Choice Ultimate, Choice Extra or Choice channels. Since you are travelling, you can not get the local, or network channels (ABC, CBS, NBC, FOX). You either have to use your over-the-air antenna for local/network or you can order their local service at an additional cost. The difference is that your network service will only come from either New York or Los Angeles.
Here are the links for information and the forms needed for DNS
http://support.directv.com/app/answers/ ... rk-service
http://www.directv.com/DNS/DNS%20Mobile ... Letter.pdf
When we are moving around, we use our non-HD dish on a tripod when we land because it's easier to find the signal. If you have an auto roof top antenna, you don't have this problem.
When we return, we cancel the service in the RV and re-start the home service.
Another route to consider, is that DirecTV is available on you mobile devices like phones, tablets and laptops.