Transporting from home to work (~10 min by car), should I just make my MacBook Pro sleep, or shut it completely down first? I just got a new MacBook Pro, and is looking at how the power modes work, and according to this article: About Energy Saver sleep and idle modes in Mac OS X, making it sleep by closing the lid (say) will put it into a low-power mode.

However, the article also says that it uses power to keep RAM contents. What I'm wondering is if the sleep mode is just a mode meant for "sleep on my desk", or meant for transport.

So, tomorrow I will bring my computer to work, by car, I have a computer bag I'll use so it'll be protected, but I'm worried that if I just put it to sleep, it'll get hotter than just regular off, and I know that you're not supposed to stash a running computer into a confined space, like a computer bag, because the heat might induce wear'n'tear problems on various parts.

So, should I:


Just make it sleep by closing the lid?
or, should I turn it completely off before transport?


Also, if option 1 is OK for a 5-10 minute ride, but not OK for, say, a train-ride to our offices in the capital (2-3 hours by bus and train), I would like to know that as well.

I've had a Windows machine for quite some time and I always put the unit into hibernation before transporting it, in order to make it go completely off, but also start somewhat faster than a complete reboot. Is sleep similar to hibernation, or is there some other mode like hibernation I should use?
It's perfectly OK to transport it while it's sleeping - I do this all the time.
The disk is stopped and the only power draw is what is required to keep the memory contents (and the fading in/out of the power light).  Any heat it generates during sleep is pretty much undetectable (in human terms).  As long as nothing is connected to it, it shouldn't wake up in the bag.