Because of the frequent succession of swimming and running sections you can loose track on where you are? How big is the next running section? To avoid this most people write the distances down on their paddles or arms. As well as the supply posts. This allows you to position you back onto the race track.
You will run 33km (long distance). A wet suit with long legs will result in extra resistance. You should seriously consider cutting the legs of your suit just above the knee.