This was once a hidden gem but now sadly has become so overrun with tourists in the summer that fencing had to be put up and a fee had to be charged to enjoy the park. With that in mind, if you are going after this cache in the summer, beware of the high traffic and muggles as well as the no parking signs along the road.
This is the driveway for the old Crowe River Campground on the east side of the bridge across from the entrance down to the actual park. You can try to park here quickly and walk down to the bridge as there are no parking signs everywhere.