I have switched back and forth several times between the two satellite tv providers to take advantage of promotions and they pretty much carry the same channels with few exceptions, currently with Dish and they are at least more responsive to RVers than Directv ever was. Yeah, they are both losing customers in bunches for the obvious reasons, we love to stream video content like everyone else, but on the road having all of our stations readily available will keep me from cancelling our satellite service anytime soon.
We have been using satellite TV while RVing for a couple of decades, well before automatic systems were available, we can easily set up our own residential satellite antenna for either sat tv provider using just a compass and our satellite receiver. It is an option if you want to keep Directv, plus you can feed multiple TVs and have access to all satellites so there is no delay when switching channels. Only reason we have automated satellite tv domes is they came with the used rig we purchased, we use them when overnighting but manually set up our satellite antenna when staying for more than a day.