Agree, incidentally I had not tried it myself until a while ago ( must be 2 years now

).And it was actually Mark who encouraged me to " fight the fear"
Do record audio off camera as well though for comparison and ease of synchronisation; you can always remove the camcorder derived audio once you are satisfied
I have tried using another camcorder with an external mic . and a minidisc : the results dont vary widely ; It is the microphone that makes all the difference
In Music videos , most times they dont even use the audio from the video ( they either use a CD or sudio recorder audio recorded under optimal conditions) while the singer or artistes mime to recorded music