Only had to authenticate the computer to the hotel WiFi, and all my personal devices had Internet without messing with the hotel connection. I used this trick at a hotel I was staying at for several months.
Once you leave, all your internal devices are still connected to your WiFi, without needing to change anything. Then activate Windows network sharing, and your router, and everything inside the RV connected to your WiFi, now has Internet access. Connect the laptop to the WiFi and then connect your router to the Ethernet port on the laptop (again assuming it has one). One trick you might try when you're at a campground with WiFi: use a Windows laptop (yes, I'm assuming you have one). Yes, changed connection is an apt description.
