I'm a concealed carry guy too - I don't shoot real good and thus like the element of surprise. But when it's 107 in the shade EVERYBODY prints. I'd go about unarmed if I really had to worry about the legal implications of anyone knowing whether or not I was carrying.
Open versus concealed is a mixed bag tactically. I think I prefer carrying concealed under a fairly light t shirt personally. You keep the element of surprise and your draw is minimally obstructed as it might be with an oversize polo.