Need advice on how to hunt large high elevation basons.

This will be my first year trying to hunt very high elevation basins. I have been told that the big bucks like to hang out in the jack pines and avalanche shoots. Is this true? How can I be successful hunting these high basins. Do I need to spot and stalk. Or come in on top and push them out. What is the key here? I also want to watch some of the areas that are above the basins that are flat. Are these good areas? Thanks in advance for any information.