I've gotta say that, whilst I'm not fascinated with old bikes as such, the BSFoS should be required attending for any current promoter, as it's the shining light example of how to conduct a race meeting. I dunno how the on-track stuff goes (too many classes, maybe?), but the sheer off-track entertainment value of all the stalls, displays, stands and bikes is worth the visit alone. It's packed with things to do and see without needing to go anywhere near the racetrack. Highly recommended.