It's kind of interesting you should mention that, as I was considering a similar question recently (I swear, we keep getting in each other's heads! xD). I've read several fics that mention him wearing cologne or somesuch, but honestly, I would think he'd try to
avoid smelling like anything in particular as much as possible - I think he'd be concerned about not being tracked, and therefore wouldn't want to give a search team any sort of advantage. But that's just me and my own paranoia talking.
When they "posed" in my head for this one, she was bending to kiss his head... I honestly couldn't tell you if he was awake or not!
Maybe he's half-asleep, just drowsing off as she's holding him...
*happy sigh*