Confirmations and arrival texts go to the phone they already gave you. They open the portal, sign forms, pay the balance, and scan the site code for the gate.
Confirmation, directions, and park updates go to the email and phone from booking. No separate blast tool.
Stay dates, site, balance, and the policies they attested to. They can pay before they turn off the highway.
A link before arrival or the QR on the site. Pay what is owed, complete forms, and receive the gate code when your rules allow it.