The movie “National Lampoon’s Christmas Vacation” is a modern holiday classic depicting Clark Griswald’s ambition to host a “fun, old-fashioned family Christmas.” The film has developed almost a cult following because who can’t relate to family dysfunction? We may not have a Cousin Eddie emptying his RV septic tank in our front yard, an Uncle Lewis setting himself on fire with his cigar or even an Aunt Bethany reciting the Pledge of Allegiance as the meal’s blessing. (OK, so maybe some of us DO have an Aunt Bethany.) “A Christmas Vacation” reaffirms that regardless of its quirkiness, a family accepts and loves its members unconditionally. And that is exactly how the Iowa Roadie felt at its latest stop…The River Bar in Dows. My husband and I visited the River Bar on a Friday night, and proceeded to fill the last two bar stools at the end of the counter. In…