I was told by the Army Corp that one or two at a time wouldn't be an issue. They have a problem with the large crowd of an event. They told me the crowd was going into to park for "daytime use" then taking over the camping area.
Now, I will repeat, this is just what they told me, not my words. I honestly think a few of us (5 or less) could get away with "playing with our toys", with no issue. As long as we respect the area. I live fairly close to the area, and would love to hang out with some other crawlers out there. I've only had solo runs so far.

Newbie to RC crawling. Enjoying my SCX10.