The tenth Download Music festival comes to Leicestershire this weekend, with Birmingham band Black Sabbath headlining on Sunday night.
Over 70,000 people will be staying at the on-site camp sites, police are reminding festival goers to keep their property safe and leave valuable items at home.
However, crime remains low at Download, with only 159 crimes reported in 2011, a reduction of 25% from the year before.
Police will be active on Facebook and Twitter, and fans are being urged to look at the sites to help crime prevention.
The Download Festival is the UK's top rock and metal music event and throughout the weekend will feature performances from The Prodigy, Metallica and Black Sabbath, in their only UK festival performance this year.
"We'll have uniformed and plain clothed patrols on all the campsites and car parks throughout the festival. We had very few tent thefts reported to us last year but we do rely on people keeping their personal belongings safe and taking their stuff out of their car and not leaving anything on display."