Clan castle question

So one of my clan mates that isn't on often just donated to me some higher level troops for a raid. My question is this, is there any way to switch the clan castle to sleep mode like the heroes so the castle units will be available when I return later. It gets frustrating leaving for an hour only to find I was raided and my clan castle units lured and killed :( Thanks for your responses

No way to switch it.. I suggest attacking when you get the troops. If you have your th outside and cc in the dircet middle it is likely the cc wont get tripped.