Andrew, are you a member of either of the clubs? Because the best (not the cheapest) insurance will either be Red Pennant (from the CC) or RAC Arrival ( for members of the C&CC). Both of these are designed for caravanners and will do what you want i.e. get you to your destination so that you can continue with your holiday, and a good deal more besides. Most other policies are just 'add-ons' to standard car insurance and may not cover all you require. This includes the standard RAC package. The Red Pennant policy will cover you for your trip, The RAC Arrival is an annual policy.