It looks to be around double the price to go from Harwich to the Hook, compared to Dover-Calais.
Whether it will cost more or less by the time you've done all the driving.
It's 250kms from Hoek van Holland - Assen (2hr 30m)*
It's 500kms from Calais - Assen (4hr 45m)*
*from
www.viamichelin.com The advantage of going Dover-Calais is that the sailing times are about every hour and a half, whereas the Harwich-Hoek sails 4 times a day (the latest on Sunday is too early, so then you're looking at an overnighter, or sailing Monday) Plus it's a shed load longer on a nasty boat.
H-H was £220 roughly
D-C was £110 roughly SEAFRANCE
D-C was £60 + £10 fuel charge!!! with P&O (why not call it £70?)
Whether its gunna cost £110 - £160 extra in fuel is doubtful (500kms = 20 gallons @ £3 gallon???) dunno what's a gallon of juice in Europe? it's about £4.20 here.
P&O quote thingy, based on a 6.5 metre motorhome...