Hello, gentlemen. Rich, Blues, good to see you. I can say that Bujinkan budo- which primarily focuses on "low observability" weapons and tactics- teaches the 3 foot stick or "hanbo" almost immediately. I feel that a straight stick is a little more versatile, but the cane is undeniably more covert.
Kodiac, while it is true that ASP batons are more size-efficient, that is a mixed blessing when the chips are down. 35 inches beats 21 or 26, and while the ASP is indeed more compact, the cane will be in your hand, and thus, more accessible.