I use a Over The Air antenna. I watch very little TV when I'm camping anyway. I'm out and camping why would I want to watch TV ? I click it on in the morning during breakfast and watch the news. That's about it.
That being said. I do keep a few DVD's in the camper or rainy times and such. I also keep a couple of kids DVD's in there for times when the kids are suck inside.
I also read books and listen to the radio in the rainy times. The DVD's are mostly for the girlfriend, somebody's kids, and company.