We did this last November with P&O.
I dont remember the ground being uneven, you have to do a bit of walking, its not 90 minutes of walking though.
The worst part was the coach journey (I hate coaches with my long legs) , although we did have a guide talking theorugh it all on route.
Catherines bar was in situ, it looks a lot better on TV than it does from the beach, we were able to have a sit down and a drink in the bar