These are some of the many testimonials to the quality and craftsmanship of don hill mckenzie drift boats we have recieved but the most important one you will hear. Plans to build the 13′ mackinaw western, mckenzie river, drift boat. the mackinaw is one of the most popular spira international drift boats. it is constructed of. Home of the original mckenzie and rogue river historic drift boats and river dories, the spawning grounds for the riverboats that ply the world’s rivers today..