I use a RAM U-bolt for the handlebar, then their longer arm so that it gets it up and outside the windshield. For my Camcorder, which is an older Sony DCR-HC48, I found this quick release for it that works quite well and allows easy removal when you stop:
http://mountinginnovations.com/QREMM-SL/QREMM-SL.htmIf your camera has anti shake features, it will be fine on the handlebars...when you're typically recording, you'll be at speed anyway, so the vibrations are minimal. I also use a wide angle lens adapter for the camcorder. Hard drive cameras won't hold up long on a bike, but if it's a card or tape, it will be fine.
Here's one example of what I got using this system...the editing isn't great, but it'll do. Mounted on the top of the right bar, in front of the master cylinder. It's on the Cherahola Skyway in North Carolina...I was leading a group of about 30-40 bikes at Maggie Valley GTG, '07. It was a Hellride...scraping the floorboards a good bit
Here's another...Tail of The Dragon...a bug got squashed on the lens, so sorry about that, but it gives you some idea...