You are correct that most campground WiFi is spotty and will not handle streaming very well. Many campgrouds, however, now have cable television. You can search for them in the campground directories either in print or on line. Our option has been Dish Network pay-as-go servce. You pay for it when needed and cancel when not traveling. Another option for entertainment is Red Box. You can rent a DVD at one location and return it at any other Red Box. Locations are on their web site. Sounds like you have a great trip planned.