Take the wings off. The're dead weight. Although it sure is a nice place to sit while you drink a beer and eat a snack. I don't know it's a tough call.

The real question is... how much beer is enough on a 39 mile distance race in wind predicted to be 5-10 knots, assuming 1 beer consumed per person per hour. Also what amount of ice is required to keep said beer cold until all beer is consumed? Keep in mind you don't want to run out of beer before you finish and you don't want more ice than is necessary, why carry all that weight for nothing. Your constants are; rate of melt, and beer consumed per hour.