Re: grocery shopping in Hawaii....
I live on the Big Island and we don't have much choice around here. I usually do all my food shopping at KTA, and supplement with going to CostULess or Costco (when I want to make the drive) once per month or so. I spend so much more money than I used to when I lived on the mainland (oh, how I miss Fred Meyer!), but I can't really figure out how to cut down on costs and still eat the food that I think is right for my family.
I also buy most of my non-food stuff online... Amazon is my new fav because "free shipping" actually means free!