Google “Wi-Fi extender for RV’s”
You can get a wifi gizmo for your PC for $10. If laptop, it already has Wifi.
What you really want is a wifi gizmo, a USB cable that it plugs into, and a metal mesh coleander (like what you strain spaghetti in).
This will be highly directive. Cut a hole in the base of the mesh, insert the Wifi recvr attached to USB cable. Plug cable into laptop. Disable laptop’s built in wifi.
When you plug the USB cable into the laptop it will find it as a wifi source. Windows takes care of this.
Then rotate the coleander to point at McDs or the campground’s transmitter. It can be quite a distance away. As in miles. The gain on the coleander dish is that powerful.
Presto, free wifi from campgrounds.