My wife and I have shot the Big Sky course each of the years they have put it on here. Decided to give this year a break. The Sitka course will have several 100+ yard shots so, be prepared and practice. Thermals will get you depending on the time of day and if you're paying attention. Last year, there was a section on the Sitka course of about 7 or 8 targets that took you down a scree slope that was fairly knarley. One wrong step and it was going to hurt. Not to mention possible damage to your bow. Plan to take your time and hike carefully. Take a collapsible hiking pole if you think you might need it.
The Locals course typically has nothing beyond about 55 yards but, the hiking is super steep, if they follow the same pattern as in previous shoots. My right ankle is crap so I have to pay close attention to foot placement when going down ski slopes like that. Grass, even dried, can be slippery and give you a ride.
Take along plenty of water. Each course will take about 2 to 4 hours - depending. Fastest I've seen anyone finish the shortest course was in 1-1/2 hours. I suggest a pack with a hydration bladder in it. They got away from plastic water bottles in coolers last year and went to sort of a fountain drink setup to refill whatever you were carrying water in. The temps might be nice and cool at 9000ft but the sun will suck the water right out of your body. If you cross one of the creeks, stop and soak your hat or shirt. You will appreciate it and it will likely be bone dry in under :20 minutes. But feels good for a while. Well broken-in boots w/good insoles and good socks. You're going to need them.
Back down where the lifts start, be sure to hit the Yeti-dogs joint for lunch. You will thank me later. Best dogs I've ever had - anywhere. Save some energy for the night-time events Saturday night. Usually a hunting-themed video/movie on an outdoor big screen and then the after-dark archery events. Loads of fun if you've never been to one of those before. Lots of vendor booths to wander through as well. You will usually see Randy Newberg, along with several other hunting names wandering through. You should have a blast!