Ok, then you will be fine. The departure point for Viking Splash tour is near Trinity College, Book of Kells. When you exit the college, go up Grafton Street, the pedestrian shopping street. You will pass the
Disney Store then turn left at the top of Grafton Street and walk down the side of the park. Theres alot of construction work in that area at the moment, not sure if it will be finished by June. Just contact Viking Splash to double check the departure point as they may have moved due to the construction works.
Then after the Viking Splash, head back to Christchurch in the afternoon