Don't do Hawaii in 3 nights. By the time you arrive, you think it's 3 AM, and you want to crash. Plus, all flights home are overnight flights, so that eats up one of your nights on your trip. 3 nights is a perfect length of time for Vegas. I've been there twice, and am not a big gambler, either. Try to go during the week if you can...it won't be as busy. Go see a show, walk up and down the strip, go to Freemont St, and walk around the casinos. 3 nights will go quick. I also really enjoyed the San Francisco Bay area. We spent a week there, but you can cut that down to 3 nights very easily.