Ok, decided to hop from light to SUL for my next trip. I recently got the Sea To Summit UltraSil 20L backpack. I'm combining that with my cuben fiber multi pack from Zpacks in "fanny" mode, in which i keep all my most important stuff in like fire starting kit, space blanket, compass, map, small light knife, some cord, etc.
I recently made my wife a sleeping bag extender since she tends to sleep cold at times. It's made out of two silk liners sewn together, with a layer of about 5.5 feet of 2.5 oz Climashield Apex inbetween on the top. I'm just bringing this on my next trip, which i leave for tomorrow morning. With the Silnylon stuff sack i made for it, it weighs about 12 and a half oz, and is surprisingly warm. To help minimize draft, wind convection heat loss, i will be draping my emergency Frogg Toggs poncho over the top. I will need this anyways since rain is forecasted for the next day.
Bringing a somewhat light weight down jacket and light weight mid layer to augment how far i can take the above down. I've thought of bringing the 4.4 oz tyvek coveralls that i cut off part of the legs/feet off of to help with that as well..not sure if i should bring it or not. I'm only expecting a low of around 35 to 38 degrees, so not that cold.
Normally i take my White Box alc stove, alcohol, and a pot, but i'm leaving those behind and bringing instant eat foods, like marinaded and dehydrated Tempeh, cashews, brown rice crackers, cashew crunch (a really tasty mix of cashews, almonds and pumpkin seeds with a little sea salt, brown rice syrup, and sugar--but not too sweet).
The only thing which is significantly heavy and i wish i could leave behind is my Big Agnes insulated air core sleeping pad/mattress. I would prefer to bring my Zlite CCF pad and a 1/8 inch torso sized foam pad that i have, but i don't have any space for it, and while i probably could rig some cord to hold it somewhere on that tiny pack.. i don't want to mess with it while hiking as i suspect will happen, that and i've started to become accustomed to the comfort of the air mattress.
Bringing some Polycryo as ground protection. Sawyer squeeze filter, 1 tritan plastic bottle and one of the S.S.'s dirty water bottles.
I guess i'm cheating somewhat as i'm not bringing a shelter, but hiking to a hut on the AT.
It's just a two day, and one night trip too. But eh, it's a start, and i like how this small sized pack is forcing me to cut things out, and to think things through very well. Day pack? Ha, i think i could extend it to a 4 day pack at the very least.
Haven't weighed everything yet, but i expect the total weight (including food and water) to be under 8lbs.