LAKE TRAVIS, Texas (KXAN) - On the upper end of Lake Travis Wednesday, a single boat jetted on the open water.

On July 10, multiply that lone vessel by 30,000, and you will find the crowd at AquaPalooza 2010 . It is like fitting the entire population of Georgetown into one cove.

"I don't think we have any idea what we're in store for, and we're pleased to have it,” said Laura Mitchell, president of the Lake Travis Chamber of Commerce . “We're absolutely pleased to have everyone here."

It is free to attend the "World's Largest Party on the Water," but the Lake Travis Chamber said it should still generate plenty of money for the area. Wristbands for discounts at many surrounding businesses are selling fast for the estimated 5,000 boats at this year's event.

"This will be the largest we've ever had, but it' not the first large event we've ever had to deal with on Lake Travis,” said Don Brent, the Lower Colorado River Authority public safety chief.