The North Face Solaris 40 Pack
This is one of my favorite overnight packs. The Solaris is designed ergonomically minded with extra padded shoulder straps and a heavy duty waist strap. The design allows you to utilize all the space possible actually making the pack seem more like a 50 or 55. Inside it is more than possible to fit one solo tent and its footprint, compact sleeping bag, 2 days worth of clothes, GSI Minimalist cooking set, 2 days worth of food, and a few other essential overnight gear. Its too small to include a sleeping pad, full cooking set and other luxury items but its perfect for me since I would prefer 8 hours of comfort while hiking and a couple of hours slightly less comfort while at base camp.
There is a open mesh pocket and a zipper enclosed pocket on each side. At the bottom there is a zipper enclosed pocket for a sleeping bag with a stuff size no larger than 12 x 4 I recommend the North Face
Aleutian or the Clayman. There are three main compartments, a small one in the front for all of your basics that require accessibility, the middle one has organizers for small gear such as sun tan lotion, compass, maps, or whatever you need. The large compartment will fit everything ells you need as long as you are a minimalist. It will fit only a solo tent with a stuff size no larger than 17 x 5 I recommend the Marmot Eos 1 or the Big Agnes Fly Creek. Also there are compression straps on each side to tighten your gear up nicely.