I called and a nice woman answered the phone. She said she had to "something" at that time, (I couldn't understand her) and was going out to open the gate right now. We only live 5 mins away, so it's not a big deal and we can't go back, but still.
It states on the website AND the sign at the gate when you get there, that they're open Saturdays from 9-5. We were there at high noon and they were CLOSED!! :(