If you have the time, I have a couple of questions for you...
Your post mentions North America, but in what time zone are the majority of your clan members (I'm Central)?
Do you have a feel for what time you would be trying the Raid?
How active are the clan members? I'm currently in a clan, but since joining I've only seen 2 other members online at the same time, certainly no chance of ever forming a Raid team.