Ive always used a coil lock on tour, and a healthy dose of being careful and choosing where to lock it. In general, the bike has always been able to be locked to a solid object close to the tent, picnic table, fence, tree, where I would hear someone trying to cut the cable, or its with me in a room, or the times in an urban setting, I choose veeeery carefully where it is left.

being situational aware is the key, but even in rural wherever (as per the machka theft) I always lock it to something. Ive lived in cities all my life and never ever leave a bike unlocked and use as much "spider sense" as I can wherever I am to assess risk, and in doubt, slap the coil lock on.

coil locks really do have the advantage of being able to go around anything, and in you have any doubts in front of a store when alone in "sleepytown" usa or whatever, you just run the cable lock through a wheel or frame and or a pannier strap.