Great site BTW. I booked 3 nights stay on a site on the Isle of Wight. This was £63.. After I booked .. I went to the ferry booking site.. £124 for the return sailing. I didn't think that a ferry trip across a couple of miles of water could be so expensive. I must admit that if I had done the ferry site first I wouldn't have booked a campsite on I.O.W.
Can I suggest that you put a advisory pop up Or at least an advisory note to check ferry prices and availability before booking a camp site on the island.
Keep up good work.