there are so many aspects to what your asking
think you need to narrow it down a bit
travel dollars, dollars spent on licenses/fees, equipment,
and a report of US hunting finances should include robertson pitman act
also if you look at individual state wildlife agencies they sometimes breakdown revenues received
this might be of interest
http://www.amfire.com/statistic.asp?page=32
Pittman-Robertson Wildlife Restoration Act of 1937
In 1937, hunters successfully lobbied Congress to pass the
Pittman-Robertson Wildlife Restoration Act, which placed an eleven percent tax on all hunting equipment. This self-imposed tax now generates over $700 million each year, and is used exclusively to establish, restore and protect wildlife habitats.
[41] The act is named for Nevada Senator
Key Pittman and Virginia Congressman
Absalom Willis Robertson.