Campground Wifi networks are notoriuosly overloaded so you will likely not be able to use them for streaming.
The solution is a cell phone data to wifi network adapter of some sort. Most cell phones will do this
(at least until the battery runs out). Some people call them "hot spots". Some people use the name of the device like "Jet Pack", "Mobley" or "ToGo Roadlink". They all do, more or less, the same thing.
Of course that is only HALF of your solution ! Then you need a cell phone data plan. Many, MANY options ! Some of the above devices are sold in combination with data plans from the major carriers (Verizon, AT&T and Sprint) or other mobile virtual network operator(
MVNO).
This is a very hot topic. Search around the internet and you will find dozens of solutions.