We know what you mean, Babcc.
Fortunately, we reached the point last summer where school holidays no longer affect our travel plans so, have managed to get returns in the first half of July for £110 each and can leave the kids at home being as they are now 16, 18 & 21.
Now, just need a foolproof method for getting them to move out so we can sell up in the UK and book the one way trip to Turkey!!