From memory when i checked previously:-
Calais to Medemblik 260ish miles
Oostende to Medemblik 200ish miles - Ramsgate Oostende ferry is by far cheapest
Hook of holland to Medemblik 65ish miles
If you factor in petrol costs etc and the extra driving and the extra nights b&b theres hardly any benifit in doing the Dover/ Ramsgate crossing
4-5 hours in a car or having a warm up beer on the boat and a nights sleep in a cabin - worth the few extra £ if you ask me