Thanks for the reply.
I had a boat with a 4' draft at Watergate, and even then was cautious about getting into Clear Lake, partially because the Depth Finder would alarm way too much unless I stuck specifically to the high traffic areas. I'm assuming it's because of the silting issues I've heard about. Your mention of being in Kemah with 6' is a relief.
I am always open to other boats, as I am just beyond the point of preliminary, but not dedicated to any one design yet. Advice, leads, etc are always welcome.