When I was in my 20's I lived in Pensacola for six years and my crew at work and myself took Black Water River State Forest canoe trips about ten times over the years. I just checked and they are still in operation and have only raised their price from the 70's price of $15 to today's price of $25.
What's unique is they meet you at the end point where you park your car. They transport you up river while pulling a trailer with six canoes. The average trip is about six hours down river, which allows time for stopping to eat and swim along the way. It was really beautiful and in all those trips, I never once saw any snakes or alligators.
I haven't driven from TV to Pensacola, but it's about 3-1/w hours down I-10 from Tallahassee to the State Park, that can give you a rough idea.
Blackwater Canoe Rental.
