I agree that a PLB would be a good idea, but that wouldn't be my sole choice. Remember things, especially electronics, have a habit of failing. A mistake in construction, a weak or dead battery, etc, when you need them most. I would definently take basic pocket gear and a small PSK and work my way up from there. You may lose your main pack so have a few items in your pockets. In that vien I was in Dollar Tree the other day and saw a small plastic box about the size of an Altoids tin. t has dual locks, a rubber gasket and seems to be pretty rugged for a buck. I think I'll get one and test it, since this subject came up.