johno; I ride and collect highwheelers. I even have an RBR Boneshaker in my window for a shop sign. They are the most citizen friendly bike to ride... everyone wants to ask questions, take pictures, and Joe Commuter usually waves with more than one finger, and with a smile on his face.
The RBR or the Classic are good bikes to learn to ride a highwheeler on, and have more rake to the front forks than a 100 year old ordinary, so less chance of a header.