I'll just add that depending on when you make the trip will make a big difference. The river goes through changes throughout the year. Right now it's up, but will soon start dropping and you'll have more wide sand/rock bars. It's a beautiful trip any time of year though.
If you get a chance, also try to make the short (9 mile) run on the Coosa from Jordan Dam to Wetumpka, it's vastly different from the Tallapoosa (and a great way to cool off in the summer). It's a fun contrast to see the two rivers that form the Alabama River.
Live by the sword, die by the arrow