From experience, I can tell you that shooting in the: HDV24 setting will play a major role in pushing your follow-along video into the documentary film category. Once you capture the video you'll see what I'm talking about.
I highly do not recommend cinemode for this. Maybe use it if you want some nature shots, but not for subject shots. You should use Tv mode at a 48 shutter speed. A general rule of thumb a friend of mine told me is that your shutter speed should almost always be at least twice the amount of your frames per second. I'm sure you're wondering about exposure settings, you can adjust that in Av mode, now if you're like me and want control over your shutter and aperture, you can look around this forum for the "photo button" trick to being able to control your aperture settings while in Tv mode. It's quite handy. Now all of this requires you to switch the camera from auto mode to program mode. That setting is located on the right side of the camera on the tape housing, right beside the record button.
I highly recommend buying a monopod, and a tripod if you don't already have one. Those two links are the monopod and tripod that I own, and I love them, they are both very steady and easy to use. I'm sure you're asking, "If I have a tripod, why would I need a monopod?" Monopods are great run-n-gun stabilizers. They are great to just leave your hv30 on them and run around with it. It's great to hold the camera in the air with, get a ground shot, or to steady the camera if you need a smoother shot, you will find plenty of uses in the field.
As far as I know you shouldn't have to change anything for the RVM, the camera has an automatic limiter that helps prevent peaking. There is a lo-cut setting on the RVM (at least I think) that helps get low hiss out, and boost other frequencies. You made a very wise choice on microphones.
I recommend a polarizer to look through certain windows, and a UV filter to reduce the sun's effect on your image, maybe even a mattebox considering you'll be outside a lot. Maybe even a focus wheel if you want some great DoF shots, this would be great if you plan on doing interviews. I know there is a user here named: Irvb who makes great focus wheels and sells them for around $39 Irv's Focus Wheels
I also highly recommend you buy a good light for your camera. If you look at taky's setup, you'll see he has two lights. You should only need one but the light that he has on his camera would be perfect it's around $79 on B&H.
With all of these add-ons you'll definitely need a good battery.... or two.... or three... The BP-2L24h sould suffice. Taky (the administrator on these here forums) sells them, you can e-mail him and he will send you an e-mail on his prices. I've seen reports of the battery lasting anywhere from 4-6 hours of recording with the LCD on vs. 45min-70min on the stock battery. I will let you know after I shoot a documentary this weekend with my BP-2l24Hs for the first time.
So, let's Review:
1. Monopod ~ $30ish
2. Tripod ~ $50-$70 for a good one. (The one I listed is for higher end Sony cameras)
3. Long-Life Battery ~ $38/ea plus $6 shipping, then $1 extra for each item, I've yet to find a better deal on this battery
4. Polarizer and UV Filter ~ around $5
5. Focus Wheel ~ $39
6. Camera Light ~ $79
I probably forgot some things but... oh well, any more questions I'll be glad to help you with. Have fun man!