Here's the method I use. I've experimented with different methods, but this variation seems the most successful. It's probably worth a "dry run" before field implementation.
(Note: The following assumes the absence of undergarments)
  1. With your business end toward the bowl, bend forward as close to 90 deg. as possible.
  2. Slide both hands under the kilt, up past the buttocks, and up onto the small of the back.
  3. Flip the Palms to facing outward, then flip the back of the kilt as high up onto the back as possible.
  4. Remain bending forward. Reach the hands simultaneously to their respective sides and start unfolding the pleats, bringing (feeding) them forward so that they hang to the side. This brings the mass of the fabric forward and to the sides so that it cannot fall back into the bowl.
  5. While holding both sides of the kilt, seat yourself while smoothing and positioning the fabric forward. Make sure your body remains leaning forward slightly throughout the operational phase of the mission.
  6. Upon completion, stand and re-drape the fabric to its rightful position. Don't forget to check and smooth the under-apron as required.

Since using this method I've never had a "Louganis" occurrence.