does this really open so late at 10 a.m.? Will I be unable to get in the parking lot at say 8 or 9 a.m.? or is it locked?

I've been there as early as 6:30 AM, with the gates open and others present/parked. The official hours list that it will be closed, but I haven't run into trouble. Gotta say though - more bugs are around at dawn and dusk. May want to wait.

It's closing half an hour after sunset, so i guess it's going to be closed.