You could also buy hog feed and other items in printed sacks. Some even had border prints that folks used for pillow cases. My father had a country store after he retired from the army. The farmers' wives would come by and tell Dad the fabrics they wanted. Daddy would pick those feeds in the desired fabrics from the stock on the truck when it came by the store.
I actually made a pink/white stripe summer suit from feed sacks. People thought I had bought the suit at the store. Some of the quality was quite good.
You have a sensational find in all your fabrics. The feed sacks are selling at very good prices. My sister in law has an internet business and sells the sacks all over the world.
Regarding the holes, I have never seen them close up because the bags were sewn with large thread chain stitch. You could just cut the thread at the beginning of the line at the top of the sack and pull the chain stitch out of the fabric.