I tried to keep this short but failed. My system is pretty well dialed in so one change can have a ripple effect, hence the long post. Thanks for any advice.
My friend and I are doing the WT for the first time starting September 7th. Our itinerary calls for 6 nights, 7 days. Starting at Longmire, we're camping at Klapatche, So. Mowich River, Mystic (taking Spray Park alternate), Summerland, Indian Bar, and Maple Creek. Because I managed to get BOTH Summerland and Indian Bar (only 4.4 miles apart) we're really hiking about 6 days.
This is actually my first trip to the whole Rainier area. I've been hiking around the PNW (Adams, St. Helens, Hood, Gorge, etc) for several years and my kit is fairly well dialed in so I won't make you pour over the whole gear list just yet. But, I would appreciate some advice from you WT veterans regarding some specific gear choices.
First, I have two shelter options (shared weight with my hiking partner):
HMG Ultamid 2 vs.
HMG 8.5×8.5 flat tarp.
The measured weight difference between the two options is 9.65 oz, less than 5 oz per person shared. Based on our camp sites, will we be exposed enough to want the Ultamid?
Second, my sleep system. Currently I plan to use:
EE Prodigy 40* quilt
Therm-a-rest X-lite (L)
Ex Ped UL Pillow (M)
MLD Superlight cuben floor bivy (L)
Lawson 1/8" foam pad (XL) under bivy
I understand that most campsites are dished and packed hard, hence the X-lite. Possible replacements for the EE quilt include a MLD 28* synthetic quilt or a WM Summerlite bag. Sleep clothing includes Smartwool microweight LS top, Smartwool Mid or Microweight bottoms, Goosefeet Gear down booties, fleece glove liners, MH Ghost Whisperer puffy (no hood), and a Black Rock Gear HadronS down hat. I think the 40* should be enough with these clothing options and a bivy, yes? I understand we need to plan for freezing rain, hail, and/or snow in September. I could replace the Ghost Whisperer and HadronS with a Patagonia hooded puffy which is warmer around the head/neck/face but not as comfortable to sleep in.
Third, I'm stuck between choices for hiking clothes. I sunburn very easily, so coverage is as important as comfort. I will be hiking in a silkweight Cap 1 t-shirt, Patagonia Gone Again LS button shirt, OR sun hat, Smartwool PhD toe sock liners, La Sportiva Wildcats, and MH Scree gaiters. For the rest, I'm debating between:
Option 1:
Ex Officio boxer briefs
Prana Stretch Zion convertible pants
ZPacks Cuben kilt and Outdoor Research Helium 2 jacket for rain
(I would probably bring the Midweight bottoms to sleep in with this system as I would not want to layer with wet hiking pants)
Option 2:
Nylon running shorts with built-in liner
ZPacks WPB cuben pants and Outdoor Research Helium 2 jacket for rain
(I could bring the microweight bottoms to sleep in with this system. I could layer with the rain pants if my legs are cold as the rain pants are easily shaken dry compared to the Pranas)
I typically hike in shorts below the tree line and pants above the tree line due to the desire for sun protection. On the WT I'm concerned about shorts not providing enough sun protection. However, Option 1 is substantially heavier, so I'm leaning toward shorts. I know this comes down to personal preference, but any feedback would be appreciated.
Finally, we're hoping that one of our resupply points will be Sunrise on 9-11. I'm getting mixed information about Sunrise being open past Labor Day. Any info on this?
More to come as we get closer, but this is where I am right now. Thanks for reading this far and for any feedback.

