Does anyone know a good place/hotel to stay between Bruges and Calais?

[emkana]

Hi everyone,
at Easter we're going to go to Germany to visit my family. We'd like to make the journey back easier by spending a night at a hotel, not travelling in one go, as it can be a real drag with the kids in the car. Somewhere between Bruges and Calais would be good, distance-wise. I thought about Bruges, but it seems to be really difficult (and expensive!) to get a room there. Does anyone know of a good place and/or hotel to stay? Possibly close to a beach, or somewhere where you can spend a nice couple of hours with children before retiring to your room...
Any tips will be very gratefully received!