When I first began to geocache, I started two series of caches: the "Gamer's Quest" series and the "Microgamer" series. The first Microgamer was a fake pine cone with the cache hidden inside. I came across a park that was chock full of pine trees, so I eagerly explored the gorgeous park, found a pile of pine cones near a pine tree, and secreted my geocache amongst the nearby brothers and sisters. It was only after people started finding the cache that I received word that the park was a "no trespassing" park, a pineland preserve. I came back, looked at the entrance to the trail where the gate was, and, sure enough, there was a sign by the entrance that I hadn't seen when I'd hidden the cache. I removed the cache, took my mea culpa lumps and saw my geocaching learning curve go up another notch.
But this is still too nice of an area to not have a geocache associated with it, so I finally decided to return to the park and hide a cache on the outskirts...near enough to be able to appreciate the beauty within but without requiring anyone to step foot on protected grounds. You are searching for a standard bison, hidden very near the park. When you make the find, please return it to the same spot and use the same type of camo to obscure it from muggly view. Note that you do NOT need to enter the park and you do NOT need to cross past the fence. However, do take time to come near to the fence and enjoy looking in on this wonderful preserve! (Added benefit: Looking at nature's beauty while searching for the cache may dissuade some passerby muggles from wondering what you're doing while you search!)
Have fun and cache on!