Relying on campground WIFI is asking for a bucket full of frustrations. Weak or intermittent signals are the norm, if there is any at all. 90% of campgrounds will not support streaming. I work from home and when we travel, I have to have dependable WIFI to access my work files. So I just added a bunch of data to my phone plan and use it's WIFI hotspot. I tried a mobile hotspot, but it used data even when it was turned off. It used up 5gb of data on travel days when it wasn't even turned on. Good luck arguing about it with the provider. When I finally hung up on the guy he was wanting me to buy another 5gb of data for $50 so they could diagnose the problem. Actually I hung up on him about 3 times. He kept calling back. I think he liked it.
Another thing to consider is security. If she has any sensitive data, stay away from any public WIFI! Unless she uses a VPN or something similar.