You can save a ton of weight and pack space just looking at options for a tent... or hammock. I don't recall if you hike alone or with a spouse, which is definitely something to consider. I find on solo trips I can carry a LOT less equipment because I can stay comfortable much easier than my wife, who requires more luxury items. I use a 30 liter pack for trips of 3 nights or less and have no problem fitting my sleep pad, tarp, hammock, food, and even a small book. For longer trips you'll probably need to go 45-50 liters, or plan resupply points for food.