Has anyone experimented with using mountain bike pads in canyoneering? I'm especially interested in knee and or shin guards. My crew just finished a trip to do some swiftwater canyons in the PNW, and we ended up doing a lot of rappels on our knees and shins because the footing was too slick to be reliable and we were trying to avoid slipping/penduluming. I'm also planning on wearing my drysuit under protective layers next time we head up there, so I'm especially interested in making sure I have plenty of protection. I probably wouldn't wear my drysuit in the most abrasive environments like north wash and such.