From Rosey your best bet is to take 71 S to the triangle, and then take 470 E to Douglas Road. Go left on Douglas and then take your 1st right, Colbern. Once you're on Colbern, you just go East until you get to Legacy Park. Take a right on Blackwell Road and then the course is your first left, Cornflower Drive. The parking lot is on the left after you come into the entrance road.
If you leave by 5, you'll definitely get there by 6, probably with time to spare.