I'm pretty sure there is no charge for the rock wall, there wasn't on the last 2 cruises I've been on. You don't need to reserve either, just arrive and join the queue, if there is one.
Hope that helps
I´m sure, that they don´t charge the rock climbing wall. They have a special desk, were you can make a reservation, when its busy. But most of the times, you can wait until its your turn. The only thing you need are their special shoes, also no charge and your weight must be in a limit.
We had so much fun, watching the people from different ages, trying to do their best. Unfortunately I´m to heavy and not that sportiv, so we enjoyed sitting in the deckchairs around the wall and enjoyd it.
There isn’t a charge for rock climbing – just show up when it’s open and get on the list to climb. I have no idea what the weight limit is for the wall but they are very careful and won’t allow any up on it if they aren’t positive they can handle that person. Actually weighing more isn’t a bad thing. I am a rather small person and it was windy a few days I was on the ship – so windy they had to close it down once and another day it was open but you had to weigh more than I do to climb it. RCCL is very careful with the rock climbing wall and safety always comes first; as it should.