I'm on the road ~250-300 nights/year. Do you really need to carry an entire second laptop with you? While I desire a certain amount of self-sufficiency while on the road, I also have learned what I can & can't source on the road.

Most of my travel these days is US/Canada, so I can usually overnight just about anything I need. I do back up frequently and keep as much on our office's servers as possible. If I get in a bind, I can remote into a desktop session at the office. I also carry a cheap Bluetooth keyboard & mouse which are paired to my tablet & phone. My phone has an HDMI output, so I can use the hotel's TV as a monitor if need be. Not ideal, but I can limp along with it until the next day. Similarly, I can always pick up a cheap laptop locally and limp along with it until I can order a proper replacement.

Now, when I'm heading out of the country, I usually travel with one of the company's netbooks or generic laptops and remote-in to do everything.