You are correct. This is 2000 ci roughly. So unless your an ultra minimalist I doubt also you could fit a few days in this. I use it as a fantastic daypack configuration and it works very well for that. With the additional loadsling though you could fit a bigger bag between the Highlander bag and the Frame to really expand your capabilities. The middle photo shows the highlander Exo Frame with the load sling and with this setup the highlander is designed as a compression panel it would be very easy to cinch a bag between the frame and highlander for a fantastic multiday pack. I have the CM25 from HPG also. This weekend I will work on setting this up for you guys to check out and throw some photos up here. Of course the Kifaru camp bag or any wet bag could be setup the same. Similar to what Steve has posted photos of.