I didn't see any replies... did you end up going? How did it go?
Myself & the MOC secretary at that time, went to a chili-festival they had back in 2010. Lots of LE present do to the credit card bikers (these are business guy / MC wannbe's who ride theIr $35k bikes to show off then park it in their heated garages near the bmw's)...
We passed many Waye Co and PPD not a word said. At that time Plymouth's police had been less than receptive to the concept of open carry. Three years later one would hope they still are taking a follow the law approach.
Seeing the lack of responses here, I am betting that's the case.