O'Neil Creek is a popular spot for hikers headed to the Enchanted Valley as it is basic the half way point. The best campsite is the furthest back one under the maple tree. You have hang food up on the bear wire. If you are a hammock camper there are plenty of trees here to strap to. The creek is cool and refreshing.
If you're not too tied I would recommend continuing down the trail an extra mile or so to Pyrites Creek as it is typically less crowded.