I also raced a Hodaka in the 1969 B-V. As you know the Trail bikes (100cc) started 30 minute after the big bikes. We pass a lot of them. There were 1000 big bikes and 300 100cc bikes. 96 expert, 34 Amateur, and 162 Novices.
I finished 4th 100cc novice, 30th trail bike, and 278th overall.
I don't think this is the Vegas race, but it is my 1969 number.