Hi Bobbi and welcome to Permies!
I found a few threads on large hugel containers
here and
here which seemed pretty successful, so in principal it should work, although I would use a more sustainable container material.
Is this the sort of thing you mean?
smart-pots-amazon
To be honest unless I had some given to me to dispose off, I wouldn't fancy those bags in my garden, since they are made of synthetic plastic and will not be easy to dispose of when they start breaking down. There are some alternate containers on
this thread which might give you some other ideas.