Milwaukee County Sheriffs have an important message for those heading down to Summerfest: don't leave valuables visible in your parked car.

Sheriff David Clarke says certain items tend to catch the eye of criminals and they'll definitely be around the County-operated park-and-rides during the festival.

Read more of the story below this series of links.

Summerfest Coverage:
• Big Gig "Ready To Go"
• Dan O'Donnell's Music Preview: Day 1
• Don't Leave Valuables Visible at Park-and-Rides
• Milwaukee Bucks' "World's Largest Draft Party" at Summerfest

The Basics:
When? 
• Today through Sunday, July 6, 12:00 p.m. to 12:00 a.m.
How much? 
• Weekdays before 4:00 p.m.: $8
• Weekdays after 4:00 p.m. and weekends: $15
• Seniors 60+ and children under 10: $3
• Children two and younger: free
• Print instant tickets
• Create Your Concert Itinerary
Getting there:
• MCTS Flyers and Shuttles

"The number one items, choice items of thieves, are the navigation systems and portable satellite radio system," says Clarke.

Other things thieves are looking for include laptops and cameras.

The Sheriffs department will have undercover deputies in parking lots looking for these kinds of crimes.