I suspect it will not be crowded since school will be in session but the crowd is likely more a function of the days of the week you want to be there. Arriving on a Tuesday is likely the best day to ensure that the weekend warriors have departed. As for snow, the month with the highest snowfall is February (0.79"). Months with the least snowfall are March, April, May, June, July, August, September, and October (0"). The average temperature fluctuating between 70.9°F (21.6°C) and 52.9°F (11.6°C). GOOD LUCK!

we were there in november i believe and there was only one other person and they parked quite aways away. there was also no snow when we were there. different years are going to have different snowfall tho.

Elk hunting season can be crowded (mid Oct)