This special all-weekend event at Nelson Ledges Quarry Park featuring headliners Slightly Stoopid, and kicks off tonight with the Expendables, Roots of Creation and the Ries Brothers. Tomorrow Slightly Stoopid gets the spotlight, along with openers Tribal Seeds, Matisyahu and Hirie. Much like 311 and Sublime, Slightly Stoopid draws from rock, ska and reggae. Admission is $140 ($120 presale) for Friday through Sunday, or $100 ($85 presale) for Saturday through Sunday. There is no extra charge for camping. (Niesel)