I have knit Kathryn's hats. I find the double thickness at the top to be too bulky, so I have adapted the pattern. Check out
http://www.dfwmachineknitters.com/Patterns/PatternsBulkyHat.html
which is a hat for a bulky machine. If you use double the number of stitches and rows on your machine and use 2 or 3 strands of 2/24 yarn, you will have a nice hat. This hat has a hung hem above the turned up part but below the top of the hat decreases.
You can insert any fairisle pattern you wish on either the brim part or the top of the head part. If the fairisle is in the brim, then the floats are covered.
The photo is of hats I knit last year. Behind the pink hat is a red and white variegated hat in Kathryn's pattern. The yellow hat with the flowers, the green hat with the big dots, and the greyish hat with maroon and green right-and-left arrows (in the back) are from the DFW guild website translated to standard machine.
It is fun to use your imagination and yarns to make up these easy hats.
Rita