Re: Thoughts on Blobster and other designs...
Big boat. Small tow vehicle. Tall crew. Camping with family. Lots of motoring.
Gonna be hard to meet all those requirements.
You may want to first try sailing / motoring your waters in either a rental or borrowed fiberglass sailboat -- as it sounds to me as if you have some rather conflicting needs.
I did a lot of sailing in my old San Juan 21, a production glass boat with a swing keel. Rigged with a bimini that could be left up when sailing, she handled waters from SF Bay to Tahoe to the San Juans themselves (trailered up there of course).

If your budget is limited, you'll need to really experience the conditions to get a feeling for which of your stated requirements are essential, and which can be compromised.
The Catalina 22 has a poptop cabin that might work for you, and a large cockpit that certainly will. The swing keel gives you a lot of leeway for where you go, and can be cranked fully up when motoring for long distances.

Once you actually get out on the waters in question, with the aforementioned crew and camping needs, you'll have a MUCH better idea of what you'll need to build.
Another option is to build the Birdwatcher-type cabin, then make a poptop for the center slot. This boat up at the Timothy Lake Messabout a few months ago had that option -- the center slot cover could either be hinged at the front and raised at the back, or lifted straight up on a frame.

Last edited by Thorne; 11-11-2009 at 04:24 PM.
"The enemies of reason have a certain blind look."
Doctor Jacquin to Lieutenant D'Hubert, in Ridley Scott's first major film _The Duellists_.