I would advise you leaving it at home. I never would have dreamed of bringing one, but I am a touring guide and a grad student at the same time, so I had to on one tour.
We will just say that tour was also the last life of my HP Omnibook.
However, I do bring my cameras with in a Pelican 1150 Lockable case and my cell phone in a Pelican 1060 Micro. Both are waterproof and have pressure release systems. They are designed originally to hold guns and other ballistics for cops. And I now hear they make one in laptop size.