we have been to Anacapa several times and not once gotten to dive with the sea lions at the rookery there. There were sea lions on a few dives on the other side of the island however.

And we did get to dive with sea lions at Santa Barbara Island where there is another huge rookery. (We have only been out in Aug-Sept timeframe.)
Going to Anacapa - the best way to do that is from boats in Ventura or Santa Barbara (not the island, the city). Spectre does day boat trips over most days of the week, and though the boat is rather dumpy and can be crowded, they do the same dive sites and it is a faster boat (gets to Anacapa about 1/2 hour quicker) than some others. Peace boat is nicer boat overall but a bit slower (2+ hour crossing), and only does day trips a few days a week, most trips are overnighters with groups. It is a bit more $ than the Spectre but food is better, plus they can pump nitrox. We haven't used any other boats in Ventura, but there are a couple more there. Up in Santa Barbara, Truth Aquatics has 3 boats, but they almost exclusively run multi-day trips. We booked a day-boat trip with them once and they cancelled the night before as they had a minimum of 15 people and only 12 booked (or something like that). We were lucky enough to call the Spectre that night and find that the Spectre had room for us.
One of the biggest differences to me in Channel Islands is that northern islands (Anacapa, Santa Cruz) are colder water, more nudibranchs and more schools of fish, while the southern islands (Catalina, San Clemente) have more lush kelp forests, warmer water by about 5 degrees or more. Santa Barbara is in the middle of the two, tons of sea lions, more rocky underwater with some kelp. San Clemente is definitely the most pristine of them with huge kelp forests and tons of sealife. Of course, there is also Farnsworth Bank, off the coast of Catalina, that is completely different - rainbow colors of anemones and purple hydrocoral and tons of fish and nudies, but it is a seamount and deep, rarely do boats get to dive there due to rough conditions.
They are all great, just a bit different.
There is the option of going over to Catalina on the ferry and staying at a hotel there, diving off one of the two dive boats and/or shore diving. The fiance might like that, too.
robin
