I have just taken the gamble on the date being 17/18
and booked P&O Dover Calais. Five day return, car with 4 passengers £50, a saving of £48 on this year. Expect the price to double once the ACO announce the dates
39 weeks and counting 
Taken same risk, £60 for 6 day return, including topbox and bikes on top

, it doesn't seem to matter how many passengers you have up to capacity of car.
For anybody booking family holidays, just paid £60 for a return ferry ticket for a two week holiday next August, again with bikes and topbox.
Much as I admire what Speedferries have done, they wanted £102.
