More than a year ago, my bride read about a class called “Pork U.” offered by Sam Huff from BBQ1 in Garden and Gun magazine.  She tried to enroll me as a birthday present; all classes were full.  She tried again the following year, but all classes for the year sold out in under 30 minutes.  Thursday, she got a call from Sam himself, and she learned there was an opening for Saturday.  I cancelled my plans. I arrived at Sam’s back yard in Kennesaw at 7:30am; I…