I've used just a light cable lock. While I did lose (an unlocked) bike in home town of Fort Collins, on tour I lost more small things, e.g. a bike bell in India, a bike light in Canada and riding partner lost a bike pump in Russia. So, I'm at least as concerned about smaller things being pilfered.
Originally Posted by
zeppinger
On my first tour I actually had nightmares at night that people were taking my bike and I was in my tent snoozing. I just read some interesting stuff about tying on or more of your tent tie downs to the bike at night and possibly adding a few bells.
http://www.2wheels.org.uk/return/robbery.asp