Hi, Fred --
I'm not a CLARK researcher, but I run the GENEALOGY-DNA mailing list at RootsWeb, and I sometimes browse through the message boards on Ancestry to keep up with current developments in the field.
Were you aware that there is already a surname project for CLARK where you can get discounted group rates? If you click through on the "Create Your Own" link at Ancestry's shop, you can type in the CLARK name to find it.
There are some projects for common surnames that do break into regional groups, so you could also start a new project if you wish, but it might be easier to join forces with the current project.