Don't let the comments regarding the crowds scare you off; I did this hike on a Tuesday and only saw one other person all day (and even on the weekends, most people stick to the Springs area and avoid the trails). This is a decent hike with a good variety of forest and open area. The trail doesn't seem to take full advantage of the park, missing some obvious opportunity to skirt the Wekiwa River or access Rock Springs. For instance, make sure to enjoy the riverside views near Big Buck Camp, because the trail departs soon afterwards never to return (except for a spur trail from Camp Cozy with limited views).
The secluded north end of the hike is great for wildlife; I saw 25 bird species with minimal effort, along with snakes, turtles, and plenty of noisy scurrying unidentified critters.
One last thing. The map provided in the 'Hiking Florida' trail guide is extremely minimal in detail. While there doesn't seem to be a GREAT map anywhere, make sure and get the map at the main gate on the way into the park. Wekiwa SP does not have any mile markers, and would do well to add trip distance signs at major junctions. But at least they have some numbered posts that are keyed with the gate map, giving you a rough idea where you are along the way. The O'Keefe book does not even have THIS on their map, nor a decent trail description, making it essentially useless. Get the park guide or play the day-hike guessing-game!
All in all, an enjoyable day. This is the REAL Florida.