Well A, if you hunted the Western Arctic herd at it's high in the 70s, that was right before their crash. 70s and 80s that herd was rebuilding. Peaked again around 2005. I had some good hunting that herd in 90s and early 2000s. Herd used to come down past Unalakleet and almost hit St. Mary's. Came down the Nulato hills and east onto the Yukon R. at Koyukuk. When they headed north they took the majority of the Galena Mt. herd.
The Kokrines hills are criss crossed with what must be caribou trails from the past. Seen a diary of a resident of the old village of Kokrines. Somewhere around the 30s. Fall time entry says hills north of village were covered in caribou.
Western Arctic Herd is at a low again. Didn't crash tho. Steady decline. Will likely increase again.