Eating Out: Sam's Club

Sam's Club or Costco? Is It Really Worth It?

So, I'm thinking of paying for a membership for either Sam's Club or Costco? I had a Sam's Club membership a while ago when we were a family of 3 (me, husband and daughter) I stopped paying because we hardly went and didn't find it useful. So, today, we are a family of 5 (me, husband, 13-year-old daughter, 4-year old daughter and almost 1-year old son). For families of 5 do you really think it's worth it? Do you find yourself buying a lot when you're there? Do you save any? Both stores are about equal distance from my house, so I would...