I think you're referring to an antenna...not a satellite....right? Those little satellites circling in orbit can get a little expensive.
Speaking from personal experience, I like DISH and I've heard good reports on their Tailgater portable antenna. I've never had Direct, so really can't say one way or the other on them. I don't know if the Tailgater is an automatic (don't think it is), but if possible I would get an automatic tuner antenna. Trying to sight a manual antenna to the satellites can be a real chore.
We just remove our DVR from the house and install in the rv and connect to the antenna (Traveler) mounted on the roof. If we go more than a couple hundred miles from home, I get on-line to MyDish.com and access their chat line and tell the person to change my "service" address and then I get the local network channels.
Ron
Really quite simple.