I do not mean to scare people away from the Guadalupe River. It is a beautiful river that has lots of exciting parts. The loop being discussed is a fairly easy trip.
However, there are parts of the river that can kill you. I quit going to the Guadalupe because I was tired of saving stupid people (and/or their children) who had not researched the river before renting a tube.
I actually had to save a 5-year old in a swimming pool float (!) because his father let go of him when he went over a small dam because he was worried about his beer cooler.
My girlfriend and I were just floating in our tubes, when she was hit in the head by a drunk who had rented a canoe and had no idea what he was doing. After we got her out of the water and to the hospital, she had a concussion.
Two different times, parents went over falls first and then could not get back to help their kids who had lost their tubes.
We were on a tube trip that was supposed to take 3-4 hours. Someone died upstream and they shut the dam down to retrieve the body. We were on the river for 8 hours, 2-3 of them in the dark.
Responsible outfitters will have maps and give you guidance as to what to do and what to avoid. The river can be a butt-dragging experience and it can also be white water.
http://www.tpwd.state.tx.us/publicat...uadalupe.phtml
This is not just the Guadalupe, ANY river in Texas can surprise you with natural and manmade obstructions and flashflooding.
Be safe and sure.