Entire Mariner's Museum Park is No Carry.
I OC'd while the wife and I attended the free Thursday night outdoor concert (Crazy Ex's played). While we were seated on our lawn chairs, one of the armed security guards walked by. As it looked like it might rain, I asked him if he had any updates on the weather. When he leaned over to talk, he saw my weapon. He asked my if I knew I wasn't supposed to carry on the premises. I said I didn't, and as far as I knew, the only posting applied to the Noland Trail. He replied, no, it applies to the entire facility, as it's private property. I asked if he was sure if that was the policy, and if he wasn't who would know. He asked me my name, which I gave him, and if I had a CHP, to which I replied in the affirmative, He advised me to be careful, and left.
Shortly thereafter, the band took a break, so we decided to leave. As we were walking to the parking lot, another security officer hailed me and asked of he could talk to me. I said "OK", and continued to walk to the car. He asked me to stop and talk to him right there. In retrospect, I guess I was detained. He was accompanied by the Director, Department of Protection Services (aka the Chief of Police for the park), who spoke with me.
He said, "I see you're carrying a weapon." I adimitted that, and indicated that I always do, and have done so every time I've come to the facility. I also said that any prohibitions weren't posted except for a sign that, AFAIK, only pertained to the Noland Trail. He responded that the Park Rules on the sign at the entrance applied to the entire facility, and that because the MM is private property the prohibition is valid.
We talked about the discussions on this forum, and how several people didn't think that the sign applied to the museum, and that there is no other notice available anywhere else, including fliers, web site, etc. I explained that if "No Carry" is in fact the policy that they want their guests to follow, it should be more clearly stated. He responded that their Legal Eagles have told them that "All you need to do is ask them to leave." And I replied, "That's correct. And if they don't, you can only charge them with trespass, because they have committed no other crime." He agreed. He also said that people assume that new State and Federal Park rules apply to the MM, but don't realize that the MM is private property.
I told him that I would post this conversation on this forum. He gave me his card, we shook hands, and parted company.