If you use Directv or Dish at home, it is easy to take one of the receivers into the RV and using either a portable dish or the Tailgater or one of the other movable satellite dishes, gain signal to it.
We these, you can pick up all your satellite channels EXCEPT your locals, all over the US. If you want locals, you can pick them up within a 100-200 mile radius of home. You can also get them to set it up and change your location, but I think they will only do it a couple of times each year. If you will be moving often, this really isn't an option. You can still pick up the satellite channels, which we use most often. We love History, Discovery, HGTV, Animal Planet and with the girls, of course, we have to have Disney, Nick and kid channels.
We have Directv and when the season begins, we take the receiver that is in our toy room and put it in the RV and keep it there for the entire season We have a portable dish (it was installed onto one of our rental units by a renter and when they left, Directv said they would come and get it if we paid $50). We cut the post off level with the yard, DH fixed a base for it out of an old wheel and we purchased 100' of cable. I use my phone with the satellite AR app to locate the Directv satellites wherever we are and point it manually. It usually takes about 15 minutes now that we are experienced with it. At first it was taking us about an hour to get set up.
With one of the portable dishes, as long as you are not in a wooded area, you are fine, but you can't have trees between the dish and the satellite.
You said you weren't picking up any local channels. Have you tried turning on the antenna booster? We can usually pick up a minimum of 10-12 channels, no matter where we are. They may not be what you want to watch, but we can pick them up.
2017 Ford F350 Crew Cab 6.7L 4x4 DRW