while the hike is nice, the view is spectacular, and the muggles are never far. This cache is sure to give you an extra surprise on the trail. The original contents: hand sanitizer, arcade coins, band aids, play dough (for those young or young at heart), rock sauce (feel good gel for sore mucsles) and a few other surprises. We wanted the kids to look forward to this one. The log book is waterproof paper. You can only write in it with a ball point pen, pencil, or sharpie. Anything else will smear and bead off the pages.