I'm leaving for Disney World soon and my ADRs for Epcot restaurants are scheduled after the park closes (I think it's 6pm). Is anyone at the gate to let diners enter the park?
Yes you can make ADR at park opening and also before if there are any times available. The parks usually have someone to escort you to your resturant when it is before they open. There is usually an entrance off to one side that is just for this.