Staff at the Lions Club Tube Rental keep hearing the same thing.
"We have lots of questions and we get lots of phone calls," said John Schramm.
Even with the city of San Marcos' new parks ordinance posted on its website, one question keeps coming up.
"They just want to know if alcohol is legal in the river,” Schramm said. “On the river, it's perfectly fine. In the park is where the ordinance applies."
The city has designated places you can take your drinks in and out of the river.
"I believe you don't need to have a beverage to have a good time," said Jose Alonzo, who traveled from Houston to enjoy the San Marcos river with his family.
Instead, he prefers to just soak in the sun and sleepy atmosphere.
"Basically just the atmosphere, how it is, it's so calm,” Alonzo said. “It's not like Galveston, lets say -- so many people, so packed. It does get packed but there's not as much chaos."
The city says its enforcement efforts are focusing on educating visitors about the rules.
For the Lions Club, they're just ready for another summer filled with bright yellow tubes.
"The rest of the summer we'll be open everyday and so we're looking to raise funds to give them back to the community," Schramm said.
City leaders hope the new rules will help keep the parks a little cleaner.
The city recommends reviewing the new rules before heading to the park.
You find them at keep at keepalidonit.org