When I use the bags... I have 1 gallon and 5 gallon bags....
I do larger runs of just the sucker/water leaf......normally I dry out the leaves and cruch them in a 1 gallon bag freezer bag, when that bag is full... I freeze it for a day.... then run it through the 5 gallon bags.
5-6 ozs of dry crumbled water leaf gives me 6-7 gs of decent hash but its not bubble hash.
Seperate leaves as you or your friend trim the MJ plants, keep all the water leaves and leaves with no visible trics in 1 bag.
Keep the sugar leaf (leaves you trim off that have visible trics/cyrstals) in another bag.......the sugar leaf or bud itself makes the buble hash
Dry and freeze all leaves
For a indica strain 4 bags are plenty...220 160 are filters 73 25 are the catchers.
If you want to do 1 lb at a time... get the 20 gallon bags but then you need a 20 gallon trash can and a drill with mixing bit
Filter bags are not illegal and they ship plain box call they direct too