>>Op Saks inside stuffsacks...
Which is how I use my OP Sak odor barrier bags, specifically inside of an Ursack (where required) and inside a spin-nylon sack otherwise. The main thing to watch out for (and why I get extended life on mine) is not to put foil packed foods (FD food, etc.), the sharp corners of which will wreck havoc on any plastic bag (they don't do LW nylon bags a great deal of good, either)inside or contacting the bag. Beware of anything with sharp, stiffened corners. Reasonable care in packing and unpacking the Sak is just SOP. If you want to rough-house, look elsewhere. Same with a lot of SUL gear.
Again, the latest generation of OP Saks (frm last year on?) seem much better than the original. Those were hard to keep going for more than 2 or 3 trips. They remain the only show in town if you want a real odor barrier that is LW.
And if you are using a bear canister, why use anything other than the cheapest possible bags? Invade your recycled (hopefully) plastic bag stash.
The Aloksaks (a very different animal) are really durable----one I use to house my 1st Aid Kit is several seasons old and still going strong.