So glad we were able to fit this into our visit!
We were advised to get there early since they control the crowd by managing the flow in the parking lot. So, we got there about 8AM and there were hardly any cars in the lot. And the trails were also very quiet and not crowded! Also, the early light is very pretty with the scenery at this location. (I was happy with the photos I took...for sure!!) Be prepared to stop and take photos!!
I would suggest taking the Phelps Lake hike. I think it's about 7 or 8 miles, but it is worth the extra effort (compared to the other trails). It goes around the entire lake and you get to see the various vantage points, the rock (where people dive in), varying terrain, a slight incline, and GORGEOUS views every step of the way (along the water and inland, too).
Do not miss this beautiful preserve!