We went for a tour on our old steel Santana, full camping gear on board, >40 lb bike and 305 lb team. Probably over 400lb total weight.
We had just Shamano BR550 Cantis with Swiss Stop green GHP pads.
Didn't feel as confidence inspiring as the BB7 rear (and Mavic SSC road caliper up front) on the Calfee, but it worked out fine.
Yes there were hills, not big mountains, but some pretty twisty steep descents, just not really long.
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http://app.strava.com/rides/177377