When I went to Hawaii a billion years ago, ok not that long ago, but it seems like forever. I figured out what the expensive part of the trip was. It wasn't the flight or the hotel or even the activities for the day, it was the food. Seriously! We ate our first dinner at the Hard Rock Cafe in Honolulu and the bill for just myself was about $35. Yikes!! My friend and I discovered a Denny's right around the corner from our hotel and we averaged about $10 a meal. Much more affordable, and thus…