I live in the White River valley. I have to say that there is a huge difference from start of season to end of season. Pressure, weather, and water all are huge factors. If I had to pick, it would be the first week. The Bulls are still in bachelor groups and not as jumpy as they will be later. I help a couple ranchers guide and they tell their paid hunters to wait until later. The elk have been pushed down to the private lands by all the over zealous buglers in our ranks. If anyone needs advice for NW Colorado, send a PM. Of course, this is just my opinion.