A friend of mine was recommending a electric shaver for the the trail. (Short trips only.) Really?? I'm not sure if any model would hold up to all the bumps it would receive in the pack and then shave my tough beard like a pro. Has anyone tried of electric shaver on the trail and if so, how did it hold up? (Yes I know the weight is a issue but hate looking like a hairy version of Big Foot when I hike.)