And just to add to what lori says, if you walk into a backpacking shop and say "I'm going somewere for 14 days unresupplied" they're going to sell you stuff big enough to carry a butchered elephant in, (because they can, and it's more expensive and so they make more money, and they're only doing what you told them to do...) and you're going to be overloaded and miserable.

If I'm out *backpacking* for more than about a week, I usually like to arrange a resupply point, so I don't end up having to carry a ton of stuff. If you're staying in one area, you could even hike back out, resupply, and come back.

Having said that, seriously, try a couple of two to three day trips first, you'll be a lot happier, you'll get used to your gear, know what works for you, and what does not. From the looks of mount charleston it is amenable to that sort of trip too.