I have been hiking with numerous cameras and camcorders so far the best all around camera that I have found is this one...

http://www.aiptek.com/Merchant2/merchant...p;Store_Code=AS

No moving parts, very light, uses SD cards, cheap, shoots in HD widescreen, has audio, takes fairly good stills, and will work on the small Gorillapod. The video quality is fairly good, it does have issues with fast motion but for most scenery shots it is perfect. It does use a battery pack but it is generic and easy to find. Mine worked great until I dropped it in the water.

If you want to spend some money I think the best hiking camcorder ever is the VIO POV.1

http://www.vio-pov.com/

It is designed to be a helmet cam but should fit the bill for traditional filming. It is also water and dust proof.