Keep an eye on the weather if you attempt the KAT. There are some low areas that are prone to flooding. The water can get too deep to pass very quickly.
In some sections, if the clay/mud gets too wet you won't be able to get enough traction to ride up the inclines. We had a GS1200, Triumph Tiger, GS800, and my CB500x all get stuck on the same hill. We had to back the bikes down the hill in defeat. And that was only after about 20 minutes of moderate rain.
The KAT is the most challenging thing I've attempted on 2 wheels. I'd do it again, but only if there was no rain in the forecast 😄
edit...I had the least off road experience in our group. Even the guys that rode the KAT before struggled in the wet. Every bike went down at least once after it rain started.