Don, why don't you try contacting the CC and see if they will give you the key? It may be worth a try.
That is an option. It's how people get into other locked areas for tournaments. But that might be only for tournaments that have been approved by the state (or whoever approves tournaments), not for those like what we do.
Either way, it's worth complaining about. If the gate is supposed to be open to the public and someone doesn't open it at all or at random times, then that's bullshit.
Ponk is a good alternate site.