Robert Plant, Gregg Allman and a newly reunited Buffalo Springfield will wave the classic rock flag with appearances at this year's Bonnaroo festival in Manchester, Tenn., which takes place next weekend, June 9-12.

With almost 175 acts, 12 stages and an endless run of camping dos-and-don’ts, Bonnaroo can get tricky. Fortunately, Bonnaroo 2011 packs plenty of nostalgia. Here’s the lowdown on a few classic acts playing the summer’s most eclectic fest.

Those who can’t trek to Manchester, Tenn., can watch the webcast by visiting the festival's official Vevo page, starting 6 p.m. Sunday, June 12. In the meantime, here's our choices for who to watch:

Buffalo Springfield, 9:30 p.m. Saturday, Which Stage

Buffalo Springfield brings folk and rock together like no other. The newly reunited, Neil Young-fronted ‘60s group is best known for their hit "For What It's Worth," but if you dig classic rock, you know their set will be filled with a collection of would-have-been rock ‘n’ roll standards.

Gregg Allman, 4:30 p.m. Sunday, That Tent

Gregg Allman made a weighty impact on rock music is as the lead vocalist, organist and songwriter with the Allman Brothers Band, but he’s also found popularity with his solo work. His latest solo release, ‘Low Country Blues,’ is focused and consistent, presenting 12 American traditionals with soulful, bluesy vocals and down-home grit, giving it a truly rockin’ ambiance.

Robert Plant and Band of Joy, 6 p.m. Sunday, What Stage

Band of Joy was the moniker of Robert Plant’s late-‘60s psychedelic folk group, and he revived the name with his 2010 album of the same name. It’s no surprise, then, that Plant is getting back to his core with a bold and joyous approach to American roots music that’s just heavy enough to please die-hard Led Zeppelin fans. His shows with the Band of Joy blend country standards with fresh renditions of Zeppelin classics. The iicing on the musical cake is that he's supported by a squad of A-list musicians, including country guitarist Buddy Miller and longtime crooner Patty Griffin. Not going to be able to see him at Bonnaroo? He's touring with Band of Joy throughout June.

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