The areas to launch from are really on all sides of the lake. The best spot is the Marina grass field located on the west side of the lake near the golf course. The marina is right there and has a full service bar and grill, live music, and great service. After having been to many of the lakes in the region this spot has been voted # 1 by the local kiters due to the great launch and recovery spots (sailboat cove - which is down wind on a S/SW wind).
From Kansas City drive up north on 169 and get to Smithville and to the lake. The marina is located on the west side of the lake south of the golf course.