My grandparents lived in East Norwich. I used to visit them from Minnesota in the summers. My grandfather would take me down to the turntable at Oyster Bay several times during each visit to watch the diesels get turned. I even got a couple of cab rides on to the table, around and back off again. We also rode the line together on several occasions, sometimes just a stop or two and back, and sometimes all the way into the city. This was early 70s.
I was last there as an adult in 1993 to visit my grandfather a couple of years before he passed away. My wife and I had been in Manhattan and took the Port Jefferson branch out to Syosset. After our visit we stayed in Oyster Bay overnight and took the first train from there back into the city the next morning. Alcos had changed to EMDs and no cab ride this time, but the experience was still great. Lots of memories.
I look forward to see how your project comes along.