I went camping up at Guanella last weekend and a lady came up and said "please move your Jeep, we're going to pull our 5th wheel in here", so I told her "you're welcome to but I'm going to be shooting near where you want to be camping", she got really pissed off and told me "you can't shoot here, it's illegal", I politely corrected her on that topic and she went away. The funny thing is that she and her 5th wheel built a bonfire, near the trees, in the prairie, with a fire ban in effect. It was pretty chilly that night and I would have loved to have a fire but no way I'm going to set the state on fire just because I want to be warm.
On the topic of shooting up there, I had never seen posted signs for "shooting rules" in a park before, it was actually kind of cool to see.