A couple of factors that can enter into the picture are snow and quotas.
In a number of places early bear season snow prevents easy or any access into areas where bears are coming out of dens. Some years, even as late as July 4 roads can be blocked, and slogging through rotten drifts can be heavy work. There are also wildlife winter habit closures that preclude access into some areas early.
The seasons can be closed abruptly and early if the quota of females is reached early. That can contribute greatly to low numbers if the female quota is reached before much of a harvest.
Also, if you are hunting where black and griz occur, you need to be very sure of your target, so long ranges may be imprudent and close approaches may alert bears. That may amount to missed opportunities.
