Wekiwa Springs also has some pretty good canoeing and swimming. But real busy on the weekend unless you take a hike. Last time I was there we saw something like 3 dozen deer the second morning... pine scrub, cypress, its a cool place. Its a pretty good cross-section of the area's microclimates so be ready, some parts of the trails could possibly be underwater enough to get you blaze hopping. Its been a dry year though, so the chance is slim.
Some of the Spring recreation areas in Ocala National Forest have some great day hikes and paddles as well; definetely worth checking out if you don't mind the hour drive. If you go, and especially if you have kids, Silver Springs is a great little place in the area as well.