I am starting my planning for an archery hunt in CO this fall we are looking at the area 44 or 45 we plan to start in the high country in the wilderness areas. What kind of weather should i expect the first 2-3 weeks of september? Snow, cold, hot not sure what to expect but want to start now if there is gear i need to get. We are planning on backpacking in if we have water filter straws is water safe enough to drink then? Any other tips for first timers?