It’s really dependent on the person. One day might be enough, or it might not be enough. It can take a couple days to a couple weeks to acclimate to higher elevation for some people. I would say get there as early as you can, but don’t plan to hunt hard right from the beginning as that might wreck your whole hunt. See how your body reacts and go from there. We hunted Colorado a few years ago. We camped around 8,600 feet and hunted multiple days at 10,000+ feet of elevation. Luckily, none of us were affected by it.