I've been to several that were posted 30.06, but the most recent that comes to mind is the Chevron-Phillips facility in Pasadena on Jefferson Rd. In many facilities, I'm able to park in visitor's parking, as was mentioned in a post previously, but that's not always the case. It all depends on who I'm going to see, and if they are willing to come to the front office or gate to escort me to their office. Some of the places I go, it's to meet with the maintenance engineers over rotating equipment...engines, electric motors, compressors, etc. They usually don't want to come all the way to the gate to escort you in. They want you to have your TWIC card so you can come in un-escorted, and drive to their shop building. So, it varies. I might see 4 customers in a day that don't require me to drive past the visitor's lot, and one that does. That one skews the opportunity for me to carry that whole day.
The other point to make is that PC 30.05 specifically defines all these facilities as "critical infrasturcture facility", and says that it's a felony trespass with a weapon. I have not seen any "unless you are licensed" statements at the end of the "Criminal Trespass" section. So, I read that to mean that it applies to CHL as much as non-CHL. Maybe I'm wrong, and in this case, I would love to be wrong. If anyone has a better handle on this, I'd be interested in hearing it.

Nov. 2010...Check!
Nov. 2012...Don't Give Up!
Jan. 2013...True Change!