Half Moon Cay Oasis

I am looking for answers from Carnival specificially since I know HAL has their own set of rules. Anyone that sailed to HMC with Carnival and booked the Oasis, were you able to book more than the 24 people? If so, how and when did you book the extra? I read on the Carnival website that someone was able to book for 27 but for some reason it won't let me post a question to the review. I have a large group sailing to HMC in 2019 and we have a long list of people who want to be in the Oasis. We know that not everyone can make it but would like to know how many we can include? We were hoping up to 30.

Also, anyone who did book the Oasis. Does it have its own bathroom?

thank you

The Oasis has it's own bathroom.

What is the Oasis?

Might need to check with Carnival directly. Excursion page caps it at 24 and it looks to be at a minimum about $117 a person at that capacity ($1595.99 "starting" base rental plus $99.99 per person over the original twelve).