The festival continues over the two following days, with such big-name acts as Styx, REO Speedwagon and the Wallflowers. There are more than 30 acts overall.
Tickets are on sale now. They're $20 through April 26 and $25 after that. Three-day tickets are $49. Those tickets are good for general admission to all stages. You may have to sit on the grass for shows at the Live Nation Amphitheatre with those tickets, but you you can get reserved seats for single shows in the amphitheater for $40-$55.
Check Livenation.com for tickets.