The cache is accessible only from the park side, so stay out of the neighbor's yard, and everyone will be happy.
Mt. Pleasant Township park is a great little park that deserves its own cache.
UPDATE 8/2015: The bridge is GONE! But no worries -- the cache is still in the park.
Please replace the cache container where you found it, and Trade Fair or Trade Up.
After I had already hidden this cache, I heard an astounding bit of radio, all about Mount Pleasant Township and its relationship with Marcellus Shale drilling. You can find the show here on NPR's "This American Life" -- Show 440: Game Changer. (Act Two is about Mt. Pleasant Twp.) Consider downloading it and listening to it while you drive to the cache. You will be amazed, too!