Capt Force
I suppose in some ways I agree. We cruised in the Bahamas many years ago on an OI 41 similar to yours -sloop rig though. Even with its skinny draft we waited for tide at Green Turtle to enter. We ran aground while really scooting along under sail at the south end of Eleuthera and survived the spillage of our cocktails. Still its a damn site easier if you have a boat that is attuned well to where you want to cruise.
So getting back to the C&C yachts in question... I'm getting the sense from the messages that I might cruise a 7' drafted older C&C with care in the east coast ICW and inlets. But it would be marginal and take a good bit of attention. Six feet would be very doable. Maybe a yacht with a keel centerboard - C&C did some of those in the late 80s. I hadn't thought of the overhead clearance brought up in another message, but I think the I on a C&C 37+ is around 50 feet, so give another 5-6 feet for the hull, it should be approaching the max boat for a 65' bridge clearance. If others agree with this, I had hoped I might be wrong, but its kinda the reality I face. I guess the Great Lakes cruising areas that C&C focused on were quite a bit deeper than my neck of the woods.