Buck,
I used a Sony TRV30 for its compactness and lightweight. Plus, with the big battery, I get 10 hours of recording and the lithium batteries hold up well in cold temperatures. Picturewise, I get 530 vertical lines of resolution with this videocamera and I used a high-grade wide angle lens and solid tripod (Gitzo) to prevent getting the shaky "tunnel vision" type of footage typical of camcorders. DVD quality is 480 vertical lines. Never in the editing/production process does the resolution drop below 480 lines so the final product has an excellent picture. I also used a Canon 1D camera with top notch lenses so the photos turn out great on DVD.
I am particular on making sure I've put out a quality product. I hired a professional narrator, had it reviewed by a former mountaineering instructor, maintained a steady flow to avoid being boring, kept it interesting and pertinent and made sure the sound/picture quality were up to snuff. Comments would be greatly appreciated.
gosc