We have cruised Princess several times and love it. However, this time we are bringing our daughters who are in their 20's and this will be their first cruise. They are very interested in the rock climbing wall and ice skating rink. Will they get to use both enough to make it worthwhile for us to try Royal Caribbean? We are thinking about Mariner leaving from Port Canaveral on 1/6/2008 for Eastern Caribbean. Thank you.