I do one craft show a year. It's this Sunday. Just last night I got out my previously unsold items in their vacuum seal bags. Each bag has let a little air in -- really just a little -- and everything is still sealed nice and tight. After the show whatever isn't sold this year will go right back in for another year. I've bought several brands and always had good luck with them. Haven't had occasion to use them for anything else.
Only problem - once those bags are opened all that stuff has to be ironed by Sunday! Yuck!!!!