I have been known to bracket when I was just unsure of the exposure.

MY problem (YMMV) is remembering to meter carefully - especially with chrome. I tend to let the TTL meters in the SLRs do their job. This is fine, until there's a big expanse of sky that overwhelms the foreground, which gets underexposed (but the clouds are pretty :rolleyes: ).

If I would just meter lower, lock exposure, ...

Bottom line, whatever works. But experience will teach you!