ferry - if we get the ferry would be from portsmouth - so an hours drive to port then 4 hours to france then a 3 hour drive ferry would cost £400 ish never been that keen on ferries get travel sick so not so keen on this option
plane - would go from gatwick - 2 hour drive - 1 hour on plane then 1 hours drive in france to destination parents would get tunnel and pick us up in france
euro tunnel - 2.5 hours to get to tunnel 1 hour on train 7 houirs driving in france to destination
We go Portsmouth Caen and drive, get an early ferry and on site mid afternoon. Better still, take the longer overnight ferry, booking reclining chairs (£5 each) and take a pillow/blanket for the kids. Then get there mid morning!
Flying seriously restricts your luggage.
We have driven from Calais (did ferry) but it is a drag. We save that for 2 day drives to the South or Spain.