Travel must be completed by Sept. 1. Rooms needed to be booked by Tuesday for stays through Sept. 3.
Prices can vary widely, depending on location, timing and rental agency.
For a report in its May issue, Consumer Reports Travel Letter examined eight rental agencies in 11 U.S. and Canadian cities and concluded that Dollar and Thrifty were the low-cost leaders, and National and Avis had the highest rates. The newsletter also noted that high-pressure tactics are a common complaint, in which customers are encouraged to buy insurance options that they may not need. Summerfest, declared by the Guinness Book of World Records to be the globe's biggest music festival, will fill 13 stages June 28 through July 8 at the 90-acre Henry W. Maier Festival Park on the shores of Lake Michigan. Nearly a million people from around the world attended last year. Music will range from glam rock to Latin, rhythm and blues to country, heavy metal to nostalgia, reggae to zydeco.