Rick, many of the guns are still at USMA, although they have moved around. The little ones such as Woodruff would be inside, probably in the Vault, as I don't recall seeing a Woodruff on display when I was there not long ago. Call ahead and see what info you can get on the phone, have them get some measurements for you. I suspect someone has already published measurements or a drawing, check with Antique Ordnance Pulblishers. There's one at some restored fort in Ohio too, can't recall the name of it,but I was shown a photo and it was definitely a Woodruff. It was found on a creek bank in Ohio. You can find all the known Woodruffs by location in he appendices of THE BIG GUNS by Olmstead et al.
