Campground tv hookup

It's not as simple as some might like you to believe. Depending upon the setup in your coach you will have a wall plate with a tiny button that turns a light on or off (ON you get OTA and OFF you get cable) or you might have a BOMB (Box of Many Buttons) that selects the input to your TV. If things are as simple as just changing the input at the BOMB or the wall plate you still need to change the TV input from TV (OTA) to Cable and do a new channel scan. In the worst case the campground requires that you install a cable box to work with their system.
Let us know what the campground says you need to do to watch cable TV and we can likely give you some better guidance. Also, let us know what your coach is, if you have a BOMB or not and any other details you might know of.