What time do the toll booths open?

For example, I'm going next week and have Platinum Passes for Early Entry, and since that starts at 9:00 A.M., am I to believe that the toll booths will be open before that at, say, 8:15 am??

The times I've stayed on property before timing wasn't a big deal, but I thought I remember hearing that one toll booth is open 24/7 so someone could (theoretically) still check-in at like 2:00 am to Breakers if they had a reservation for that "night"!?

i have been there as early as 7:55 and the toll booths have been open

There is always at least one booth open 24/7... Opening day we went through the toll booths at 6:45 AM.