DVCAM is not MPEG. You would need to convert your material by importing it to the PC by firewire and some software in order to put it on a DVD-RW. DVD-RW can be playable in DVD players, but it can also hold data. In order to be playable in DVD players it would need to be in an MPEG2 format (in spec).
There are some professional recording packs coming out that that fit to DVCAM cameras that allow direct to DVD-RAM and possibly DVD-RW formats, but this is not MPEG and they are not playable like a regular DVD.
EAS
edit: You could look into some of the dvd recording decks that are out in Japan and some out or coming out in the US with firewire input. You may be able to go from DVcam to DVD-R directly without messing with a computer.