Brad, you lucky dog!
I had the joy of playing Greywalls last September. Really memorable; and just plain a blast! But even though a 30 handicap, I will make one recommendation for that course. Like a good pitcher, keep the ball low! This course can only be skyball with pinpoint accuracy, because when I hit those greens it BOUNCED! Big!
Fortuantely, and I assume intentionally, many of those greens can be approached from the ground. But you need a line.
I will note again that no one mentions Sweetgrass, about 60 miles south at the Potowatame Indian Casino [Island Resort]. It was an enjoyable course, worth your time to play, and the deals for packages with Greywalls and Timberstone were awesome cheap! You can play Greywalls every part if you want, or mix however. Stay there!
Doug