What will surprise you is how many possible solutions can be had for 50 cents at a Salvation Army/Goodwill.
For instance, to carry my handout literature, I picked up a black leather handbag with snap, that is waterproof. My sister in law said it cost at least $50 new. It would easily roll up into a bundle for attachment to a post.
And mine is a zip up folding umbrella case, maybe a foot long and roundish in shape.