I am unexpectedly travelling to Prague on Thursday, expect to spend only a day or two there and then to drive (flying there, driving home) towards Calais. This is entirely unplanned, no accommodation booked etc. There seems no shortage of hotels so I'm not concerned about finding somewhere to stay but would appreciate any tips on what to pack in to the short time I'll be there. Also any tips for the drive back, intend to use the tunnel and then head for the ferry to Ireland (home).