Extra filmers might be easy to come by...but finding others that actually do a good job can be very difficult. It requires some skill...and for most people, doing this kind of filming isn't something that comes naturally.
At least - that's been my experience.
I'm fully with you on this one. Most people either don't have an eye for good framing, or aren't able to operate smoothly. That's why I suggested in
Part 1 to hitting up a local college that has a media/film production department and letting the professors set you up with some of their better students. College kids are usually looking for experience, will do it for the love of music/production and sometimes already own their own equipment, or use bum some from the school.
Now, good and knowledgeable audio tapers are even harder to find