I've never used those bags, but I don't think I'd store quilts in them. I'd say either rolled, or fold and hang on heavy duty hanger, cover with garbage bag, and tie bottom loosely. I do this, but they are rotated seasonally. Any more than I can use, I give away, other than a couple extras. Don't know if you are interested in donating, but Victorias quilts sends to cancer patients, and they are in great need, they'll even take just quilt tops and finish them to send out. I have sent them some tops, as that's my favorite part of the process.