Wadena, Minnesota where we found this sign takes its name from Chief Wadena of the Ojibwe tribe although we are still looking for the smoking gun. His people had a reputation for roasting moccasin seams until they puckered. If you go to Wadena on the first Saturday in August there will be a Pig and Wing BBQ challenge happening.
These are all the clues we have to go on, other than the possibility they have another form of competition that involves another kind of smoking. We suppose it might be possible if the law comes around disturbing folk, the participants could shout oink, oink which in case you didn’t know is a sound that pigs make when excited.