At the moment, most of the charter operators that we work with offer private fishing charters on FishingBooker. We've started acquiring charter operators with split charter and shared charter offers, and a few party boats. Still, the majority of offers are for private trips. Only a few locations have shared fishing charter offers at this time.
As far as anglers coming to us inquiring about shared trip opportunities, we always recommend making friends with a few like-minded anglers on your vacation, and splitting the charter cost among yourselves. This strategy has worked for many of our previous customers, and is preferred to simply joining a trip, as it gives you an opportunity to pre-screen the people you will be fishing with for the next 4-to-8 hours, and inform them about your exact fishing preferences in advance.
Make sure to choose a fishing charter with a short notice free cancellation policy as a fail safe and you're good to go!