How can I have camping sites that become unavailable when someone registers for them?

I need a form for registering for a camping event.

 I need the sites that are taken to state they are not available once someone registers for it.

Hi, thank you for contacting us.

What you described can be achieved using the Gift Registry widget, as it allows you to set elements that have a limited availability whenever a form submitter picks from them: https://widgets.jotform.com/widget/gift_registry

I hope this helps. If you need further assistance please let us know. Thank you.