Why would nonresidents have to pay higher fees for hunting and fishing licenses?

The reasoning/justification for this probably went something like this:

1. This state has conservation programs to preserve wildlife habitat so that hunters can continue to hunt game here.

2. These conservation programs are paid for partially by taxes.

3. Non-residents can get hunting licenses and hunt here, but they don't pay taxes.

4. We should increase the cost of their hunting licenses to make up for them not paying taxes.

There's also the fact that, given the choice of what group of people to tick off by higher fees, "people who can't vote to remove me from office and who, while they do have guns, live a long way from here" are generally going to rate higher on the "bend 'em over" scale than "people who CAN vote to remove me from office, have guns, and live right next door, metaphorically speaking."