Your TV and Blue-Ray player, if equipped with WiFi, can connect to a WiFi network such as the one in your home or the one in a campground. However, the capacity of such networks is limited and will not likely support streaming by very many residents, if at all. When I visited Top of Georgia last year, I could use the network for general internet surfing, e-mail, etc. but streaming would not work. I suspect that the IP port used for streaming is not open.
If, however, your cable service provider or your internet provider has WiFi hotspots you can log onto, they may support streaming. AT&T, for example, has WiFi hotspots distributed throughout many areas which might support streaming, but I'm guessing they are not typically in places where campgrounds are located.
Another option might be to enable your mobile phone to act as a hotspot. I have done that, but I don't stream on that connection because it uses too much data.
If I remember correctly when I connected my BR player to my home network, there is a menu option to select your WiFi connection. Just go there and set up for whatever network you have available.
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