In my Eastside elk hunting, the spikes are all just random. Sometimes solo, sometimes a couple spikes together, one hanging out with some cows, or spikes in the herds with big bulls and cows. I haven't found a way to just target spikes. Seems to me they are just running around with all the other elk. Some years I see multiple spikes throughout the season, some years I see zero. I would say just keep finding the elk and you will eventually find that elusive unicorn.