Grace Nash, 20, and Bruce Crawford, 22, stood in the ankle-deep water at the Painesville festival for two hours during the weekend and spent four more hours walking around the festival and distributing the fliers, WJW-TV, Cleveland, reported Monday.
"We went down the (Grand) river without life jackets and when questioned if we were on the river, we said 'no,' which was a lie," Nash said, "and we are here from Judge (Michael) Cicconetti to pay the price."
Police said there had been severe flooding at the time of the incident last month and a massive search had been called for the pair.
"We got back to the vehicle and realized we were surrounded by fire departments, and helicopters that were coming in," Crawford said.
Cicconetti handed down the unusual sentence after Nash and Crawford were convicted of misconduct during an emergency.
"We've learned from our mistake," Nash said, "and we'd like other people to learn too."
Swim Week Miami Beach 2014 [PHOTOS]