Of the ones I attempted, "Mount Pleasant Path" in Clark Nature Center was probably the hardest. It was only about 40 feet from the trail but that was a really tough 40 feet. There was a thick wall of brush, then a drop down to a creek, and then a climb up the other side of the creek into another thicket. I brought hedge clippers so with some patience, I was able to cut a hole through the bushes and punch my way through. Thank goodness it wasn't a difficult cache hide because I didn't think I'd be able to wander around much in the bushes on the other side of the creek! I was informed by the cache owner that there's a footbridge (although I didn't see it at all) and there used to be a trail on the other side of the creek, which is now overgrown because the township didn't maintain it.
Aside from the challenging stuff, there was also time to look at old buildings, the Cobra King, and chicory, plus a dinner trip to Philadelphia Chinatown on Sunday night.