Is it still cost effective if you have to take an extra day off work for the drive each way though? I haven't seen anybody above factor that in.
I'd really love to drive next year, but expect I'll end up on the plane due to time constraints.
Door to door it took about the same time. We've always been up stupidly early to drive to gatwick, park, bus to terminal, check in, wait in various security queues, get on the plane, get off the plane, wait for your bags, wait for coach/taxi/hire-car, then finally get there some time in the evening.
By driving you bypass all of the unloading the car and faffing about, just drive on to a ferry, hit the autoroute and roll in to your resort about 8 hours later. Easy.