So, the Eurotunnel is pretty much booked up when we are going to France. So we are now crossing at 9.50 pm, can we still stay on an aire if we turn up very late? ( never used an aire ) is Gravelines the obvious choice? The return journey is much the same, we have had to book an 8.20am return crossing but not too worried about that one. I can't believe the tunnel is so heavily booked!! I know the ferry is cheaper but I can't do on the water.........