A Slipknot festival, of course! Corey Taylor and company are taking Knotfest to San Bernadino this year, with dates in October. Bands like Danzig, Five Finger Death Punch, Volbeat, Black Label Society, and many others will be joining Slipknot for the three day festival!
While I am sure you will have to hide your disappointment over the fact that this isn't a Don Knotts fan convention, I think this kind of makes up for it. Get more info HERE and check out Slipknot's set from 2012's festival. Blah, blah, blah...watch out for naughty words at work.