Celebrating their 15h year, Summer Camp Music Festival is bringing the biggest event in the Midwest for Memorial Day Weekend! Running May 27-29 in small-town Chillicothe, IL, this year’s installment already features headlining acts, moe., Umphrey’s McGee, STS9, and Thievery Corporation, as well as support from Lettuce, Greensky Bluegrass, Yonder Mountain String Band, and many more.

Today, they make the extraordinary additions of Mudcrutch (ft. Mike Campbell, Tom Leadon, Randall Marsh, Tom Petty, and Benmont Tench), Big GRiZmatik (Big Gigantic, GRiZ, and Gramatik), as well as The Roots, Excision, Ani DiFranco. Further additions include Cherub, Fishbone, George Clinton & P-Funk, Lotus, Andy Frasco, Exmag, The Main Squeeze, London Souls, The Motet, Earphunk, Steve Kimock & Friends, Michal Menert & The Pretty Fantastics, Kung Fu, Giant Panda Guerilla Dub Squad, Gibbz, The Funk Hunters, The Heard, Sister Sparrow & The Dirty Birds and more!

Check out the full lineup card of second wave additions below:

And here’s the first round lineup card:

Tickets are currently on-sale now. More information can be found on the festival’s website.