I haven't read through the response (have to work sometimes!) but at first glance, I noticed two things. Do you REALLY need the rain pants? Jacket, sure. But, the pants? Seems like overkill, especially in that region.

And, food. We've found that the weight of an ultralight stove and a small canister of fuel is nothing compared to bringing dehydrated food. We swear by Mountain House. If someone else is bringing a stove, offer to carry the pot, or fuel so you can have some hot water. Compared to non-dehydrated foods, like tuna and chicken, the complete meals are much more efficient.

Oh -- and I would bring the smaller sleeping pad. Every lighter option helps -- anyplace you can save an ounce here or there will add up. Conversely, every time you say that this is only a little heavier, you're adding more and more. Go lighter with every option. They all add up.

By the way, super-jealous of your trip! We don't have any backpacking planned this year, and I can tell I'm going to be missing it.