Hmm pretty much what i have aleady.... The munros modded to accept side pouches. But i have a hankering for canvas....
No rush though, was looking for advice as google foo only comes up with tiny fashion bags, duluth, frost river and over priced (imo) surplus packs
Old surplus canvas packs are good, but will never be as strong as Duluth, Frosts River, Rugged river. [IMO]
So on canoe trip, for instance, and giving a surplus pack some hammer, throwing it about, so to speak, rivets and stitching may well go.
Personally, I think its worth the investment, for a bombproof canvas sack.
I use a canvas day pack, in summer and carry roughly 6-7 kg, which is a nice weight, and Im fine for miles without a hip belt in a t-shirt. [Some of that is water, consumed on the journey.]
In winter, thick woolen clothing, jacket, walking slower, make the carry more comfortable, than just wearing a T-shirt, so I can add an extra couple of kilos on top of that.
Anything more than that, Id want my rucksack with a hip belt.
Thats just me. Other people with other bodies, will have different comfort and weight levels.
You gotta ask, what do need it for?