"I have this really nice, square little ukelele that's like a cigar-box shaped," Johnson says. "That instrument is kind've a tradition in Hawaii. They used to make them back in the old days. A friend of mine in San Diego made me this one that fits in my backpack perfectly. It's the size of a coffee-table book. Other than that, I just take a backpack. We were gone less than a week, so you really don't need anything. I bring two pairs of trunks, and a couple of shirts. The nice thing is if you get dirty you can just sort of stick 'em in the salt water."