Just some quick thoughts. If you are going to do this, you want to get your hands on the best equipment possible. Don't know where you are, or who else is nearby, but if you can get a better pre/AD or two, it will probably help the sound a lot. If you are going to get a board patch, then I would be inclined to try to run the mics on stage or stage lip. Don't know the room, or band make-up, or even style, but board and up close usually makes for a good mix. You might want to try this set up in advance to see how things sound. Some boards just plain suck, others are okay, but in small clubs, they always have their limitations.
The cameras are another issue. A lot depends on the camera quality, and its low light capability, white balance, etc. Have you ever shot music video with it? Many times lights can wreak havoc on the white balance, and produce all sorts of bizarre effects, lines, rays, etc. If you can, take the camera to the venue well in advance, and just try it out (with an explanation and permission of course.) You probably want to be off-axis at the back of the room, depending on the lighting. If the lights coming off the stage are high-powered, and going directly into the lens, you are not going to like what you see. Try different angles, from the center to the corners, to see what will minimize this issue. Adjust your exposure level as necessary to balance between the evils of too little light, and total washout.
Everything can eventually be put together in post production. Not having timecode will make it a little more labor intensive, but many many DVDs have been made this way in the past. Good luck. But I would definitely try to do your homework first.