Colorado is an awesome place to archery hunt tons of elk, and lots of rugged places to hunt. If you are going in early September think about what the elk need that time of year, and their most likely habits. Also with you being solo you need to think about getting meat out, it's going to be warm so I personally would put a cap on how far you are going to be able to hunt in order to get meat out in timely fashion. This means you need to go more in depth with your spot choice instead of just thinking about showing up at a trailhead and marching 5 miles back start looking now for little pockets closer by that will have the elks needs, imo steepness of terrain keeps more people at bay than distance