1) Get a MiFi device by someone like Verizon. It's about $100.00 for 20GB's a month. But you'll chew through that in no time.
2) If you have a cell phone that has an unlimited data plan that allows you to tether, you might try that. They will start severely throttling you after the first 18-20GB though. Most unlimited data plans on a phone won't allow you to tether though...
3) Don't count on any campground having any WiFi that would be available for any kind of streaming. They provide you some wifi to email, surf the web some pay your bills online and that's about it.
5) Books are always good
6) Kindle
7) Radio
8) Arts & Crafts
9) Board Games