How many people to launch a rocket?

I suppose this is harder to figure out the larger and more complex any launch
campaign gets, but if you take one of the smaller LEO-capable boosters
(Taurus, Athena, etc) and assume there's nothing unusual about the payload, how
many people get involved in a launch? I'm not talking about the organization
staffing the ranges. I'm curious about the number of people it takes to
transport, integrate, erect, checkout, and launch a booster. (I specified
ground-launched boosters, as I figure Pegasus is likely to be an anomalous
case.)

Naturally, I'm also wondering what that costs (the actual launch process, that
is, excluding all hardware costs and range use fees.)
Matt Bille
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OPINIONS IN ALL POSTS ARE SOLELY THOSE OF THE AUTHOR