Oh I dont know..... maybe rookie orientation (class only) every 5 years? Theres not alot going on at 4pm the day before a race anyways. I know I've done it twice, once for me and once with my son. I learned alot, Nate does an awesome job!
We (as in me and whoever is in our little crew) do the RO every year regardless. If somebody new tags along, I make it mandatory they do the RO, whether they are schlepping sammiches or on the starting line with me. It really helps get the head inline with whats going on, seeing changes in realtime, and helping new crew feel comfortable with procedures.
Your basic idea of a refresher course is a good one. But also what Miriam said, education is continuos, for all of us, riders/drivers/crew alike. It's easy to get into a comfort zone and make mistakes. All in all, the SCTA does a great job keeping us all safe, including spectators/photogs/media what have you. We should continue with extreme respect for what our volunteers like Nate, Miriam, Bill, Jim and so many others do for us.
In that spirit, we are all stewards of one another. Fostering positive attitudes about safety first with each other should always be the prime goal, next to going
fast of course.