This sounds like a neat place to visit, and just the kind of thing our kids would love. However, I haven't been able to find anything about opening/closing times. Are there any? The couple of reviews I've read have either not addressed it or just said "jump the fence" or "climb over the wall." Now, if that's the way it's done, fine, but I'm a little apprehensive about doing so without assurance that that's acceptable. To me, if there are gates and walls, they're there to keep people out. I feel like I'm trespassing if I jump them. Can anyone give me any guidance?