My great uncle was stationed in Anchorage or somewhere up there during the Korean War. He said they used to announce on the radio or over the intercom at the base if the caribou were crossing a road somewhere. You can get a migration report and when you figure out when they will be there set up on a crossing or migration trail. I went to hunt them in Quebec but I came back empty handed. Caught some nice lake trout though! Good luck

-SteveO