Rather than carting him around?
Tonight my friend was round at bedtime for my DC. Usually I settle baby to sleep before putting the others to bed but he had been woken by the neighbours dog. Rather than spend another 20-30 mins settling him and the older ones being over tired and upset, I figured I'd put him down and could then have them all in bed in under ten minutes and then be ready to tend to baby for the rest of the night.
Afterwards, my friend asked me if I often leave baby crying to deal with the older ones. I said it would have taken me twice as long doing everything one-handed and that him being in their face crying would stress them out and cause them to be upset. She said that at least baby would feel comforted by being held, even if it meant having to cry for longer 
What do you think?