Some states will just have to raise the cost of hunting licenses.
Montana just did that 2(?) years ago.
It cost them far more than they calculated it would save. By increasing permit fees so much in a single year, they scared off more the majority of their non-resident hunters and fair portion of resident hunters. The loss of revenue from the application fees, alone, really hurt the budget.
Rather than increasing revenue, they actually crippled themselves and alienated a lot of hunters.