Call/email Tina at Scuba Luv in Avalon - if the King Neptune is going out on that day you can just jump on. She might also be able to hook you up with a buddy or a group that’s coming out to the island. I take a group every year in Feb and Tina is very helpful. ph: 800-262-3483. When we take the boat, there’s always a few divers who just jump on as part of our group. More fun that way. (I don’t work there, they’ve just always done good for me.) btw - Great breakfast right next door to Scuba Luv.