I backpack/section hike a lot in the Appalachian and Blue Ridge mountains so already have a lot of packable (stuffs into own pocket) type clothing. Im going in April as well and taking my Mountain Hardwear Ghost Whisperer. Itās a 800 down filled puffy jacket that packs (stuffs) into one of the side hand pockets. It weighs 7.2 oz (203 grams), has a hood (they also make a hoodless version), and stuffed dimensions are about 7 inches by 4 inches. The menās version might pack out a little bigger but not much. Itās very deceiving, it looks and feels paper thin, but is extremely warm while hiking never been cold while wearing it. They are pricey but if u do a lot of hiking or overnight backpacking itās worth the weight/warmth/price/comression ratio to me anyway. Itās water resistant but not water proof. If raining Iāll wear my wind/rain jacket (MH Ghost Lite) over top which also packs (stuffs) into its own pocket about 3 inches by 3 inches and weighs 3 ounces (85grams) again menās version might pack out a little bigger.