I had the same issue. Then I talked to all my clients - NONE OF WHOM ever worked weekends - ALL OF WHOM took at least one vacation a year. I told them I had to have some downtime or they'd be looking for a new service supplier. Not one of them had anything bad to say. Now I tell them a week before I'm leaving that I'm going on vacation and they just deal with it. I lost 2 our of 55 clients, both are now back with me after less than 6 months - no one else will dow what I do - never mind the money involved. What use are you to them burnt out? or dead?

Like my colleagues all kept saying - GET A LIFE!

They were right AND I do not take the laptop anywhere when I'm on vacation - very liberating. No one dies, the world does not end and everyone manages - just like in the rest of the real world.

Go on vacation, leave the laptop at home - just tell them first! - BUT do not ask