Preheat oven to 375°. Line a 9-in. square baking pan with foil, letting ends extend up sides; grease foil., Reserve 1/4 cup crumbled bacon for top. In a large bowl, cream butter and sugars until light and fluffy. Beat in eggs and vanilla. In another bowl, whisk flour, salt and baking soda; gradually beat into creamed mixture. Stir in chocolate chips and remaining bacon. Press half of the dough onto bottom of prepared pan., For cheesecake layer, in a large bowl, beat cream cheese and sugar until smooth. Add eggs, milk and vanilla; beat on low speed just until blended. Pour over dough in prepared pan; drop remaining dough by rounded tablespoons over cheesecake layer. Sprinkle with reserved bacon., Bake until golden brown, 45-50 minutes. Cool in pan on a wire rack. Refrigerate at least 4 hours before cutting. Lifting with foil, remove from pan. Cut into bars.