The Q x/c was by far the most enjoyable and satisfying part of the training for me.
I'm sure you'll have no probs with your route. If all else fails just follow the Kent/Sussex/West Sussex coast all the way round and back again!
You'll be nervous leading up to it but as soon as you depart you'll have a whale of a time! You may come across some interesting traffic at Shoreham waiting to go home after the show! Bonus!
Most of all enjoy. You will feel like a REAL pilot after this experience..