JMT 2009

It might be beneficial if you let everyone know when you'll be out there….August? Sept? Late September?

How about maps, camera?

I'd also take an extra pair of socks. My first pair got shredded out there last year.

Early August, and yes I do have maps, just forgot to include them.

I would add a light weight insulated vest or jacket for those cold mornings. I used pretty much what you list for clothes except that I had added a Montbell under vest (5 oz). I used it about half the mornings under my wind shirt. From the Evolution Basin on south, you are high and it can get cold. I saw a measured 25° several times; in the Upper Basin, at the Rae Lakes and at Guitar Lake for example. Also, I would take both the instructions for your Steripen and some Micropur-type purification as backup.

If the shirt you hike in is wet from sweat or rain, don't you want a dry long sleeve shirt or long underwear top to wear at camp? If it gets below freezing, or even a wet 40, you might want gloves or mitten or at least shells to cover all of your hand? Liner gloves under fingerless gloves also help. Cold makes my finger tips numb and useless.

This might help with your shelter set:
http://www.backpackinglight.com/cgi-bin/backpackinglight/poncho_tarp_techniques_gear_inclement_conditions.html