We arrived at the Wallace Falls Park parking lot at about 7:45AM, and there was lots of parking still available in the main lot. When we left at 12:15pm the lot was full and cars were parked quite a ways down the road outside the park. The bathrooms were cleaned and well stocked.
The trail is in great condition, BUT, there is way too much toilet paper right on the side of the trail! Don't be that person. Pack along a zip lock bag and put your toilet paper in there and pack it out to the garbage cans or bathrooms at the trailhead. Here's is WTA info on how to leave no trace when you have to go in the woods:
https://www.wta.org/go-outside/trail-smarts/how-to/how-to-poop-in-the-woods

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