Hi Robert – I think that a lot of us find ourselves in this situation and there is probably no right or wrong. I am a one-man-band and in days gone by, I did used to answer emails and take / make work calls out of hours or on holiday. About 5 years ago I changed to keeping pretty much office hours and not taking work calls at odd times / weekends / on holidays.
I give regular clients a couple of weeks notice of holiday plans; this contact often results in a friendly response of ‘thanks for the heads up; we will be in touch about another project after you get back’.
Also, I increasingly found that those who contacted me over weekends / at odd times were not great to work for (‘grinders’ as they are known here!), but those who stuck to ‘office hours’ usually worked at sensible and reasonable companies. Also, having ‘down time’ and refreshment helps working time to be more productive and enjoyable in my experience – family time / non-work time is special and I don’t want work interrupting it.
Obviously there are times when deadlines need meeting that this all goes out of the window, but because it only happens a few times a year now, rather than every other week I quite enjoy it – the trick is to not let work dominate your life and most reasonable clients would probably agree with this.