We probably can't board before 11am at the earliest.
TIA
Then you probably don't want to go. The good operators all try to get
out early-early-early and back in by 1 or so. When the Trades kick
up, the channel can get very rough.
Plenty of "operators" for snokeling trips. Just pick up one of the
activities rags at OGG on your way to the car counter. I can't
recommend any because we've never used one.
If you take a dive trip to Lanai, stay away from the eels. If you
bike down Hale'akala, watch out for small rocks in the road. The ER
is small, the people are good but unless you're bleeding out or fully
arrested, the wait can seem like forever.