I wouldn't be planning on doing any streaming with campground wifi. Even with a good signal, almost no campgrounds have the bandwidth to support this, especially with more people attempting it.
I'm staying with DTV for several reasons:
Streaming allows no recording (that I'm aware of.) I record everything. I can get a signal virtually anywhere. I rarely need support.
Yeah, it's more expensive, but you get what you pay for.
"If I'm wearing long pants, I'm too far north" - 2oldman