gcw,
I have not had the opportunity to paddle the Blackwater River although it is on my list. Here is a reference guide I have found useful: A Canoeing and Kayaking Guide to the Streams of Florida, it is a two volume set. You would more than likely be interested in volume 1, North Central Peninsula and Panhandle, by Elizabeth F. Carter & John L. Pearce, Menasha Ridge Press. The book describes how to get to put in point’s, river mileage, places to camp and a description of the flora and fauna. I hope this will help.

flp