There are tailgaters, then there's Joe Cahn. The 58-year-old former resident of New Orleans sold his cooking school 10 years ago, purchased a recreational vehicle and hit the road. He's living a guy's dream: Freedom to go where he wants when he wants as the self-appointed Commissioner of Tailgating. Cahn has turned his pleasure into a business of sorts, with a website, corporate sponsors, talk of a book and nibbles from producers about a television show. Home? That would be wherever the R.V.'s are. A link to his 2006 tour.