My sil Nylon hex tarp and sil poncho served very well on the AT, kept me very dry both by day with poncho and by night with the tarp. They both dry fast when the sun comes out. Cuben works even better in that it does not stretch when wet and is of course lighter in weight and quite a lot more expensive. I am pretty much set on a new cuben tarp and cuben Packa or poncho for my hike.
Thanks to all of the replies I have some new things to consider. I will try a night on an old Zrest on the floor of my house, if I can tolerate it I can carry something very lightweight for ground sleeping and continue with my existing hammock and one of my underquilts. The idea of the new hammock was so that I could place a pad between the two layers on the 1.1 dbl instead of the underquilt, and this might be a retrograde move.
If I use my present hammock I can switch to the lighter Nest UQ and 40 deg topquilt when I get to about Tahoe then back to Mt Washington4 with either my 20 deg WM bag or a new perhaps 0 deg topquilt at Cascade Locks. (as you can tell I dont like to be cold at night)
As for my other gear, I switched my very lightweight Luxury Lite pack for a somewhat heavier (4lbs) Deuter in Mass on my AT hike and I was very happy with the change.
I have a carbon fiber Expedition bear cannister which I purchased for my two JMT hikes and I will use this throught the Sierras, right now its my intent to carry 11 days of freeze dried food out of Kennedy Meadows to go directly to Muir Trail Ranch. I also have an 8 oz ice axe and Kahtoola microspikes for the Sierras which I may or may not need depending upon the winters snowpack so my pack will be heavy for the first half of the Sierras..
I intend to use my Ti Zip stove until fire bans cause me to switch to my Caldera alcohol stove. Stoveless is not a consideration for me, I really enjoy hot nutritious meals on the trail and several hot drinks throughout the day (my trail name is Hot Drinks).
I have purchased a Sawyer squeeze filter, I have used Aqua Mira drops for the last several years but unfortunately after my AT hike I suffered from Ocular Toxoplasmosis, perhaps from the hike perhaps not but it turns out the Aqua Mira does not kill the T Gondii parasite that causes this. I know its rare but it almost cost me my eyesight so I will filter from now on.
I only carry one Kleen Canteen so that I can be totally confident that I can fill it with boiling water for a hot water bottle and it absolutely won't leak. I will use MSR bladders and gatorade bottles for the rest of my water.
My clothing is well dialed in for me and is quite minimal and lightweight. I hike in trail runners.
Again thanks for the input, the ideas certainly give me a few more things to think about.
By the way I will journal on Trailjournals under Hot Drinks, its already underway, I did likewise for my 2011 AT hike.