Gavin & Stacey sounds interesting.
@Jibers, assuming a sedate 20kph riding average, that's 10 hours of riding, which should be achievable even with wind. So even with a worst case 1 hour getting off the boat, there would still be time for 2 hours worth of stop time. That increases to 3 hours if we average 22.5kph. So notionally a 45 minute lunch stop, 30 mins afternoon tea stop, which would leave between 45 minutes and 1.75 hours for the end of ride meal/refreshment. Extending further if we get off the boat quicker. I've only done the Newhaven Dieppe ferry, and there we were underway within 30 minutes as they let the bikes off first.
A circular or triangular route would lessen any wind issues, in terms of avoiding a 100km ride potentially directly into the wind. I'll take a look at your previously posted route suggestion next week, and see what our options might be.