By mid-afternoon when the North Carolina band BIG Something took the main stage, five bands had already played, and a huge crowd filled the field and surrounding hills. But if any group could do it with style and passion, it would be the next band Tedeschi Trucks Band, playing their first of two sets at this year's festival. The band ended the set with a tribute to one of the original Lockn' jam bands, with a searing version of The Allman Brothers' Whipping Post.