do you have to pay to float on the guadalupe river?
Yes, you do have to pay to float on the Guadalupe River. The price depends on which place you go through. Here is a list of places that offer tubing on the Guadalupe River http://guadaluperiver.com/site/listing/outfitters.
You can go tubing, rafting or kayaking down the Guadalupe river. You do need to pay for rental of the equipment. There are plenty of outfitters there where you can rent gear.