Sounds like the Railroad Museum of New England in Thomaston CT is running a night excurion on June 24th and night photo op to raise some money apparently for the damage recently done on their property by vandals. I guess they also run some ice cream 30 min excurions over the summer too. I think thjt B&M SW1 in original paint scheme will be the power for that night run.
https://www.rmne.org/
https://railfan.com/night-on-the-naug-to-raise-funds-to-repair-vandalism/
https://www.wfsb.com/2023/05/12/rail-cars-vandalized-railroad-museums-thomaston-station/
https://www.fox61.com/article/news/history/thomaston-police-suspects-vandalized-railroad-museum-new-england/520-6843752f-1ea4-4c51-b1b3-c4d5f7fbbb68
