Hey LeslieAnn,
Don’t be discouraged if you don’t get a reply from anyone, as your window is fairly specific to location and dates. But there are a couple other options available to you. You can do a location specific member search on this site and e-mail divers directly to ask if they would be available. Not everyone checks the Forum board every day and your date is quickly approaching. But best of all I would look up dive shops in the area you are staying and simply sign up for a boat trip through them. They always have a Divemaster/guide who will dive with you. Plus they will typically pair you up with another single diver sure to be on the boat. Every time I’ve dove the Islands I have never had a problem getting paired up. It’s a great way to meet new people as well. If you were going to Maui or Kauai I could even recommend a dive shop. But I’m not as familiar with Ohau. I have noticed that 99% of the Divebuddy members seem to live on Ohau, so you chances look good. Have fun! I’m jealous.
Rich