I have doing some research on our idea to hike from the Beaver Creek Wilderness Area to Skaguay Reservoir and on to Cripple Creek. From what I am reading, I am not finding a lot of people who have made the trip. Seems most hike down from the reservoir and then back up.
Those that have done the down/up say it is very difficult, no trail to follow. You will get wet as you will need to cross the creek several times and will have to navigate large boulders and more. Not only that you will most likely come a across black bear.
Check these out: