[M3desmo]

I fortunately have satnav in my Beemer so getting lost won't be a problem provided I enter the correct destination details. Have also been offered to join a convoy of TVR's which arrive in Boulogne on Speedferries at about 2:00pm. I am trying to decide whether to just get going as early as possible (as my ferry is at 8:15am) or whether to stock up on some supplies in Calais and then make my way over to Boulogne and wait for the TVR boys to turn up. As I will camping on Houx (with numbered pitches) am I right in assuming that I won't arrive on Wednesday evening to find my site taken?