I agree Fritz. Take many pictures frequently and often is now my motto. Years ago, living in western Montana,and watching the Milwaukee Little Joe's and Box Cabs go by thinking that I can always photograph them tomorrow. Then when tomorrow came, they were gone. I have a very limited collection of them even living there for 10 years.
Also, Thanks for sharing your photos. They are the way we can go back to the timeframe you had the opportunity to see the NG from your perspective