Princess Cays

We will visit Princess Cays on our Carnival cruise in June. Looking at Princess Cays excursions (from the Princess Cruise Line), they have the aqua bikes and banana boat excursion to purchase. However, on the Carnival website none of those things are listed. Is there any way those items will be available to rent on the island or are the excursions listed on Carnival's website the only ones?

I will be at Princess Cay in July and I was looking at videos and saw these items on the beach. I would think that you can rent them when you get there. Yes there was no option to pre-book these on Carnival's website.

Maybe someone on the Carnival Board here on Cruise Critic will know if you can rent aqua bikes and banana boats one you are at Princess Cays.