Friday & Saturday, August 31 & September 1:  Wilcox Health Sports & Fitness Expo.  Savvy fitness enthusiasts and families from all over the U.S. and several countries will gather on Kaua`i to see and sample the latest in athletic footwear, apparel, fitness equipment, nutrition, and cross training prior to experiencing The Kaua`i Marathon and Half Marathon.  The Wilcox Health Sports and Fitness Expo is the location for Official Race Merchandise, late registration, packet pickup, complimentary presentations and much more. Grand…