Small lock-n-lock in the end of a hollow log and under a pile of sticks. Don't disturb the mushrooms. The area is fairly open; hide is not in dense foliage.
Quoting the Horse-Shoe Trail Conservancy's web page ...
The Horse-Shoe Trail is a 140-mile long hiking and equestrian trail in southeastern Pennsylvania. Starting in Valley Forge National Historical Park, the trail spans Montgomery, Chester, Berks, Lancaster, Lebanon, and Dauphin counties, intersecting the Appalachian Trail at its end point.
The Horse-Shoe Trail Conservancy, established in 1935, is a non-profit volunteer organization that maintains and preserves the 140-mile public Horse-Shoe Trail for hikers and equestrians.
This section of the trail is well-traveled because there is easy-to-access parking and the destination hike of Eagle Rock. Like much of the trail, this section is not flat. It is rocky. But it can be hiked in all seasons. This Interactive Trail Map shows the route.
Cellular phone service can be spotty here.
I was surprised to see "horse-shoe prints" when I placed the container. I haven't seen horses here, but that was a fresh print. Please note that horses have priority on the trail. Step aside and be calm and quiet as they pass. Foot hikers have priority over bikers. I've heard a way to remember this is whoever has more feet on the ground has priority. Bikers yield to hikers. Hikers yield to horses and their riders. The National Park Service includes that in their summary of Hiking Etiquette.
From parking, carefully walk south along the shoulder of Route 322 across Hammer Creek. Then turn left into the woods to pick up the yellow-blazed trail. It was about a 0.6 mile hike one-way from parking.