I’ve used foodsaver bags in this manner. Had some stored for about 8 years now and they are doing fine. They are stored above ground. I have had a couple over the years lose their seal. Those foodsaver rolls are not the most robust thing in the world. But if they hold for a week, they usually hold forever if the plastic isn’t damaged.
We folded the ends of the bags after first seal, then sealed again and for extra secure seal duct taped them
No leaks
Anyone who has used these foodsaver bags knows what you are talking about - I use them for bagging/freezing venison as I process it. Bags either seal well - or they develop leaks - and usually, the leak is evident within a week, even in the freezer. I figure that is why the original poster suggested double-bagging. That’s probably also one reason for the desiccant and 0xygen absorber being included.