You might be out of luck with the Waterfront Centre. I called them the other day and they told me I was lucky to get a room for one night because now it is a 2 night minimum. I booked this awhile ago.
I was debating about combining the Helicopter with Ocra Whale watching. I thought it would take up too much time in the day. From previous posts it seems that there was a great amount of wildlife viewed. I guess you can't do everything. I leave 2 weeks from today. Can't wait!