We always had a week skiing (well, 5 days really) in term time in the 1970s. That was our annual holiday. My mother used to let me have the odd "mental health" day off, too. Just for pottering around the house (keeping her company when she felt she needed a day off?).
@Noble: the main problem is jetlag. If we timed it so that we were there for one week, finishing on Easter Monday, then we'd probably at least manage to be sociable (stay awake long enough) for the Easter gathering (2pm-ish start). But unfortunately Easter 2014 is so late (21 April) that I think English school must start back only a few days later, so we'd have to miss school for sure after all.
I read that nearly all other MNers transit instantly to local time after long-haul flights. We don't. DH did it once when he flew without kids & just slept most of the flight. I never did that even pre-kids.
I wonder if we went over for say 13 days, then flew back (lose a day), then just call the kids in sick all the days they can't get out of bed & still recovering from Jetlag, if that would be acceptable, they'd be recorded as ill not unauthorised and we'd get one decent week out there with family.
It's okay, I don't mean to whinge. I know it's a first world problem. Just psyching myself up for £4k bill in 2014 and only going back twice in next 10 years. The worry is my dad is getting elderly, right now he can get over to see us for a few days each year but I don't know if he can keep that up for another decade. I'll feel bad for letting him down by not going back to visit. First world problems, I know.