Aloha,
No doubt you'll be going into Honolulu. Your best bet is to go to Waikiki, find the Ala Wai Marina (lots of masts), then, as you face the ocean
head down the left side of the marina and take the second road to the right along the piers where the
boats are. At the end you'll find the Hawaii Yacht Club. There is where you'll meet some sailors. You can also walk the docks. Friday night races start forming up at about 3PM and most any boat you see readying to go out will take additional crew. That's another way to meet folks who sail. Do a
google map for Hawaii Yacht Club.
Maybe some Honolulu folks will reply. I live on the Big Island about 5.5 miles from where the lava is about to take out Pahoa Village so just now my thoughts are somewhere else.
Happy traveling.