August-September has been the months so far, but that is mostly because it is getting slow on the East Coast around that time and that is where all of the conventions have been held so far.
Spotts may want to make it a little earlier so we don't get snowed in during the last weekend of August.
not likely unless we are on top of 14,000 ft peak.
It varies somewhat but for the most part Colorado doesn't see snow until late September, and even then it's not that much. This year we have yet to see the first flake fall on the eastern plains, where you are planning to meet.
What lies behind us and what lies before us are small matters compared to what lies within us.