Drop the State revenue in one place (non-resident fishing licenses) and it's bound to cause an increase someplace else to make up the difference. Maybe camping fees in State campgrounds go up as a result? They may not go up as much as the cost of a non-resident fishing license, but not everyone who camps also fishes.
In some States this would never fly, like Alaska. If I remember correctly seniors there don't have a license requirement and non-resident licenses are a big part of the State revenue with the sport fishing during the tourist season. A lot of the tourists who come to fish are retired.
Personally I don't mind paying for those things I use and not paying (either directly or indirectly) for those things I don't.