We love our Traveler in motion permanent dish on our roof. The wife can watch TV on long trips. The only downside is a highly treed campsite. I have spent 30 mins moving forward and backward trying to get a signal. This year we purchased an X2 portable dish for those treed sites, so I am looking forward to using that as well for TV. We do travel some places where you just cant pull in an OTA channel, and our Dish service has local channels plus, we wouldn't travel without it.
As far as recordings you made at home, you would have to carry that DVR box to your RV and take it with you, as it stores those recordings on a hard drive within the receiver.