Seems to me, if you got that feeling that you need to ask on a forum, or be sneaky, and try to avoid being seen (caught), you probably already know that there is something wrong with just going for it. As child, we got away with it, mostly the grown ups didn't care, unless we did damage. Even if we did get into trouble, mom and dad would smooth things over, and maybe we catch it when we got home. Guess the past generation, just lost the use of their XBOX for a few days, which was okay, since the neighbor kid had Playstation, and his dad bought all the really cool, adult rated games... As grown ups ourselves, we have to face harsher consequences, for some of the things we do, maybe not so cheap or easy to smooth things over either, we aren't considered ignorant children, who just need to be taught better.
The courthouse isn't a recreational facility, almost nobody goes there to have fun, deserves a little respect. The grounds and landscaping is usually well taken care of, so you can pretty much figure somebody isn't going to be happy seeing you digging holes in the lawn, or trampling the shrubbery. Plenty of places to hunt, without taking risks. Get permission, or move on. Consider it's a small town, if you get popped for something, slow week for news, you could be on the front page... Sure, at the end of the day, you only get a warning, or a cheap citation, which probably gets dismissed if you go to court, but likely cost you more, than you are likely to dig up.