I never really considered the oxygen absorbers, good idea. That site looks good.
So far I mostly bought on Amazon, it took me a couple years to get convinced. I mostly have bought the larger ones & cut them to size. I have some of the zip lock ones too, they work well if you don''t open them a lot but the plastic zips seem to break loose from the mylar at some point. When I got there I just cut off the zip & heat seal it.
I can fit a whole summer crop in a couple large igloo coolers, with our humidity swings the cooler insulation is a big help.
Mylar conceals the smell so dang well. I had an extra stinky Skunky VA that just reeked. Once sealed a human could not smell it. A real treat for the senses when you open it. I made sure I had a couple friends close by to watch reactions.
Watch the thickness of the bags when ordering. As I said I could not heat seal the super thick 7 ML bags with a Foodsaver but a hair straightener did the trick.