I have had DirectTV (DTV) for over 20 years and I use it in my coach and my home. Technically you are supposed to have a separate account for each but almost nobody does this and if you don't tell them they won't know. Very happy with the service and the equipment but their policies are not always so friendly. If you are using it just on the coach, and part-time, Dish is more flexible as they allow you to pay for a month at a time with no limit on "time-outs". With DTV, you can only have two "time-outs" per year and for not more than 6 months total per year. This does not affect me as I use the same account at home and on the coach so I pay all year long and just use the service in the house or coach, depending on where I am.
If you want to watch two different shows at once, you would need two receivers. There is no monthly charge for the first one but the second and subsequent receivers cost $6 per month. They also require a two-year service committment.
I have two HR-24 DVR's that give me the ability to watch and/or record up to 4 channels at a time, and watch different things simultaneously on two different TVs, all in HD. Works great. You could also get the
Genie which can record 5 shows at once, plus a remote unit for the second TV. It is their latest and greatest. I have no experience with this unit but I have seen both good reviews on it, and other reviews that said it was unreliable. I don't know which to believe, so I am staying with my current setup.
There are other variables as well. I pay $3/mo for Whole Home Service, which allows my two DVR's to share recorded programs, thus enabling me to watch a show that was recorded on one DVR from the other DVR.
You lose your local network stations when you go more than 200 or so miles from home (same as with Dish), so I also pay $15/mo for a Distant Network Package (DNS) that gives me network stations anywhere I go. These are rebroadcast from either New York or LA, whichever you choose. Alternatively, you can get locals over the air on your batwing, but sometimes the reception is poor or non-existent depending on location, and ever since the stations went digital it is a royal pain to tune them in even when the reception is good. With DNS if I have a view of the sky, I have networks with no messing around. To me this convenience is worth $180 per year. DNS is only available on RV, boat or trucker accounts and you have to send a copy of your vehicle registration as proof. This is Federal law.
I think Direct costs a bit more, but has better equipment offerings for the RVer. Dish has a wierd policy that they discourage use of a DVR in an RV, because they say the hard drives will fail. This is baloney, as my DVRs have been working great in the RV for years. I think Dish has better RV support. They have an RV program and an RV support desk, and they don't care if you share your account between your home and your RV, or turn your service on and off repeatedly. Since I don't subscribe to the NFL package, if I didn't have DTV already, I would be very interested in Dish. But I really don't know the details of the Dish equipment and how it compares, and my Winegard Travlr antenna is already setup for DTV with no wiring or settings changes needed.
Most of the Dish installations that I have heard of have been simple one-receiver setups, which would not accomplish what I want. It would be interesting to hear how others have setup Dish equipment in their RV's. Particularly advanced topics such as DVR's watching two different shows at the same time on different TV's, SD versus HD (I know that at least one of their units only shows the second program as SD). Also, any information on how the Travler is converted to Dish, and whether the standard Entegra wiring needs to be changed for Dish.
DTV is not perfect, but is a very easy installation in the Entegras as the Entegra coaches come completely setup for it.