We just got back from our 3 day Wonder cruise. We took the bus from the Port to the Caribbean Beach Resort. When we left, there was one bus that goes to the resorts. You can get on the bus anytime after you leave the ship, but the bus will not leave until it is nearly full. My DS and I had to wait about 15-20 minutes. We got off the boat at 8:15 and was on the boat by 8:30. It took me a little while to find one of our bags.
Before our cruise, I called the number on the transfer ticket and told them what we needed to do. Since we only booked the 3 night cruise through the web page, our transfers were to be from the airport to the port then back to the airport. We were at the ASMu before the cruise and needed to return to the Caribbean Beach after. Since the ASMu is not one of the Cruise Resorts, we needed to get to one of the cruise resorts for the first part to the port. There was an additional $4 charge for us to transfer back to the CBR, which they charged to my credit card over the phone.