We'll be in Kauai for 4 l/2 days in August, staying at the Plantation Hale in Kapaa. Normally I shop at Costco and comparison shop at my local grocery stores to get the best prices on groceries. With our limited time, where should we do our grocery shopping for the best cost savings? Should we check out Cost-U-Less or would their quantities be as large as Costco's? I'd be willing to sign up for a club card at a place like Safeway if it doesn't take too long. Will they ask for our home address or do we put down where we're staying? Where's the cheapest place(s) to buy last-minute souvenirs like t-shirts and mac-nuts? Costco or Walmart or elsewhere? What other souvenir recs do you have? I'd mainly be bringing things back to our married kids and co-workers or yummy treats for ourselves that we don't have in Utah. Thanks for your advice.