Bob DBF
Contributor
Do I search for the boats and contact the captains myself? By one-nighter, do you mean doing multiple night dives?
The boats I have dealt with in Santa Barbara and Ventura have done their own booking on the day trips, however on multi day trips I have found the boat is booked by a dive shop or club, and you have to book through them. So far I haven't had an issue getting a spot.
The multi day trips are usually two (one nighter) or three days. Check with the boat, on live-aboards you may be able to spend the night onboard prior to the departure on the next morning.
Bob