Colleen Cam was on Playboy October 1979. In that issue the Playmate of the month was Ursulla Buchfellner photographed by Peter Weissbrich.
In the cover you can see Burt Reynolds with Gig Gangel.
Colleen Camp was in a section called "Apocalypse Finally" along with Cyndi Wood and Linda Beatty Carpenter.
This is the cover of that Playboy issue: