10. Weapons of Mass Destruction
OK, so maybe not everyone uses umbrellas like Britney Spears, but no matter the weather, if you're camping for kicks, bring an umbrella. If it rains, you'll keep dry. If it's sunny, you'll keep from getting sunburned. And in all honesty, you may just need it to hide your face from the paparrazi (not beat them, Britney).