Puberty: Toddler, Sam's Club

Should I Get a Sam's Club Membership?

I buy the following items quite frequently: Goldfish crakers, Life cereal, peanut butter, and diapers. I clip coupons, but find that I am running from store to store chasing deals on those items. For those of you moms who are members, do you have to buy an item in bulk before you get a good deal at Sam's or do you buy just one package at a discounted price, such as peanut butter? Thanks for your advice. M.