I made this handout to help out in my teaching of Revelation chapters 1-7. I'm hoping it will help answer student questions that may come up. This handout is geared for teenagers, and all the sources are LDS.
The Ashburn Virginia Stake made a great video with ideas on how to make or alter clothing when preparing for Trek. The video includes instructions on fabric types that are safe around fire, skirt lengths, and how to make a man's shirt for trek. It also has information on what to read to prepare for trek.