When your guests pull into the Fort the entrance splits into two lanes - one for returning guests with a Key card to open the gate arm and the other for all other/check-in guests where the security guard will say hello. They can tell him your last name and site number (if you told your guests that) and they can drive right to your site if you want them to. Or you can ask them to park in the parking lot and you can pick them up, etc.
You'll have no problem as long as they know the name of a current guest.
Bama ED