Finally , do n't forget to hydrate -- even if cold water is the last thing you feel like drinking , you still need it .
If you take snacks along with you , keep them in an inside pocket so they do n't harden or freeze .
Do n't forget to hydrate -- even if cold water is the last thing you feel like drinking , you still need it .
If you take snacks along with you , keep them in an inside pocket so they do n't harden or freeze .