Finally I think I have found a useful site for trip planning at motowhere which is aimed at bikers (just with the descriptors you can add to your routes – like’low-enforcement’). Draw a line from Hook of Holland to Marienbad in the Czech Republic and it automatically snaps to a route and gives you an idea of the mileage. Here’s my proposed route for the first days of my proposed trip across eastern Europe. I wonder how sensible it is. You are meant to be able to load the routes into a GPS. I wonder if that will work.