My experience is that the outfitters tend to be the voice of the non-resident hunter, as that is usually where the bulk of the outfitters' income comes from.
Kind of. My experience has been that outfitters tend to be voice of their own industry, rather than the voice of NR's.
While most of their clients are NR's and increased NR opportunity should increase their client base, they tend to appear that way but in reality, they're pursuing what they feel is in their best interest first. Nothing wrong with that, it's what every trade group does.
Closest I've seen is State Wildlife Federations who usually have a fairly substantial number of NR members. They tend to advocate for the resource first, which benefits all hunters, resident or not.
With certain exceptions, of course.