One of the very best ways to get a feel for the nature of the Cahaba River is to spend a couple of days and a night camping on the river.
The first day is much like the Day Trips described above. But instead of crawling out of the river at the end of the day, we find a sand bar, pitch tents, cook a meal, and spend the night by a campfire. Soaking up an entirely different kind of experience on the river is great fun. You must provide your own camping gear and food.