I took my 7 and 15 year old children out with A Day Away for the dinoflagellate tour, and boy were we thrilled! The "bio", as the guides refer to it, was truly surreal! We kayaked down a gently channel to an inlet, where we we observed glowing jellies, leaping mullets, and Florida's beautiful nocturnal wildlife. There was no dangerous wildlife to worry about at all. Our guides were careful, vigilant, knowledgeable, and charismatic. A special thanks to Jessica, who took extra time to help my little one, the youngest on the tour, to experience the bio and learn about it's origin there.
The river was amazingly quiet, and we did not have a lot of trouble with mosquitoes. That said, we may have gotten lucky that night; be sure you have bug spray applied, and carry extra, and go prepared to be soaking wet. Have a change of clothes with you in the car.
When you receive the driving directions, they instruct you to pass the by the one-way gravel road that runs through Black Point Wildlife Refuge. However, I recommend you leave for the tour an hour early and drive the loop. It runs for about seven miles or so, and offers such awesome wildlife viewing that we were glad we accidentally drove through! The road actually loops back to the main road (glance over a map before you venture in). Bring your camera...so many gators and birds, and such beautiful terrain!