I spent a few frustrating days figuring that out Pier. And have most of it documented in threads somewhere
in here.
To answer your question, no my camcorder does NOT have an input jack for audio.
I record the video, while my computer (specifically, Adobe Audition 1.5) records the audio. that's one reason why I can get high quality sound on my videos.
Then I dump the video and it's audio into Adobe Premier Pro 1.5. Import the the drum audio track, sync it, then delete or mute the video's audio parts. there's more slicing and dicing going on, but that's basically what I do.