Well, after a couple of years of reading the forums on this site, I attempted my first truly ultralite trip this summer into the Wind Rivers.
The trip was absolutely terrific! Many thanks to you guys for your endless insights and commentary. The forum participants here are thoughtful, considerate and helpful.
My pack came in somewhere between 10 and 11 pounds, including consumables. I scarcely felt it the entire trip. My kit was so simple and easy, a snap to pack and unpack. I experienced all types of weather, so the trip was a true test of ultralight gear in many conditions.
My group was a traditional "heavy pack" group, and I was the butt of many jokes throughout the trip, but I had my victories:
1. At one point, a fellow hiker asked if I had enough warm clothes. I told him what I had brought in my pack, and he then admitted that I was more prepared with my kit that he was, notwithstanding he was carrying literally 5 times the weight! (What could have been in that pack?)
2. As a highpoint of the trip, on the first evening, we got hit by pounding rain, wind and lightning for 3 hours. I was nervous about my down bag and the Spinntwin. But I shouldn't have been; the tarp stayed taut (it was a good pitch, in a meadow, in the lee of a boulder), and I got only a bit of spindrift, which the bivy easily repelled. In fact, I cooked my dinner, while everyone else huddled in their tents waiting for the storm to let up. It was a WONDERFUL way to experience a rain storm in the mountains–so close, so involved, but protected.
(The GG Spinntwin is truly a work of art–a beauty of design and function.)
The trip was a short. All I could schedule was 2 nights and 3 days. I went with friends and hiked a circuit around the Cirque of the Towers in the Wind River Range. The first night we camped at Big Sandy lake, the second day we climbed Jackass Pass and camped at Lonsome Lake in the Cirqe basin and the third day we hiked over Texas Pass and hiked out past Dads lake et al.
I carried:
Pack/Shelter/Sleep:
–GG whisper (with hipbelt)
–GG torso pad/1/8 in leg pad
–GG Spinntwin
–WM Highlight
–BPL Nano bivy
–Homemade golf club treking poles
Clothes
–Smartwool zip T (worn)
–Railriders pants (worn)
–smartwool socks (worn)
–Montane featherlite
–Homemade MLD style poncho tarp (also serves as a backup shelter)
–Micropuff vest
–fleece hat and mittens
–warm socks
Kitchen/Etc
–repackaged acquamira
–beer can pot/alcohol stove kit
–two twenty oz gatorade bottles (attached to shoulder strap with bungee)
–repackaged miscellany in ditty
–a couple of stuff sacks for organization

