The difference is when you collect a fee, the client is not an "agent" they are a "customer".
Anyone can do as they like on their outfit, but,I will not risk my guides license, or my bond.
Until I get written conformation from an ODFW Officer, that a "client" is an "agent", on private ground, I WILL REQUIRE A LICENSE.
Besides, then we can hunt anywhere, and not have to worry.
FYI page 9 of 2010 Oregon lawbook "Nonresidents must obtain a valid nonresident hunting license,or nonresident juvenile hunting license if 14 years of age or older."