Ok, I'm wrong. The last time I checked those laws you were required to have permission, directly or indirectly, from someone.
Permission to own or use the gun under supervision, and permission after the area is declared safe for the use. That can be official or not, depending on where it is.
The closer to big cities you get, the worse it is.
Still does not mean dickall for airsoft use. You guys get a cookie, or a beer.