I'll take a camping ticket at Houx if you have any left:

Scott Waye 07765 598960 or scott@waye.co.uk

You could also try freezing the beer (I've only tried lager) before you go, putting it in coolboxes with frozen ice packs, and being religious about opening the boxes in order.  We've had good success with Stella, freezing around 60 cans, leaves about 2 "splits" and some cans can be used to keep your meat cold.  If you leave on Thursday night you should still have cold beer on Sunday afternoon.