Anteavacay

We are planning a Dolphin Swim at Blue Lagoon. Considering the VIP one that includes lunch. We have 4ppl that will want to interact and 2 non swimmers who won’t, but want to observe, also have lunch, and go to the beach. Anyone know how to book them? I’ve heard with Covid they try to keep ships separate and have different departure times for different activities. Would like to avoid paying 3-4x as much for 2ppl for essentially a beach day trip.