Also, where in Mass are you at? I went to high school in that state. I was a NH native the rest of the time until I joined the USAF and got out of the NE forever.
Initially, Custer's battalion only faced a few 'stay-behinds' at the ford. Although he had 5 cavalry troops(C, F, E, I & L) only 2 or 3 went to the spot in my photo.
Once Reno was driven from the river flats... and word got around of Custer's approach... THEN the thousands of warriors began to appear before him.