So I have ATV's and dirtbikes, and I'd really like to be able to take my watch with me on the trails and such when I'm out camping (GPS while riding my ATV on my wrist would be pretty nice) My question is how well does the apple watch hold up to debris such as dirt and sand? I have a series 2 aluminum watch and I don't want to mess it up with sand or something. Could sand get into the digital crown or anything and mess stuff up? Should I get a case? Should I just get a small screen protector? I've heard people say cases will just trap sand and such inside and scratch it even more. I would definitely wash it off after each trail ride and stuff with some water, just kinda concerned.