Take a look at the Merlin from Seek Outside.
https://seekoutside.com/spectra-merlin-daypack-talon/It is a stand alone daypack, about 1400 cu-in. Also it is a clip-on added bag to most Seek Outside packs.
I use it for a light daypack,
It can carry all of this no problem,
Silvertip shelter/pole/stakes
Helinox ground chair
1.5L Nalgene bottle
Stove/fuel
Binoculars
Clipped on to the Unaweep framed pack,