From an NTSB record on a Ugashik area fatal accident of a Cessna 180, there is an appended section of additional information:
The transportation of passengers via aircraft by guides to fishing lodges, hunting lodges, and camps in Alaska, has been permitted, in the past, by the FAA under CFR Part 91 rules. In January, 1998, the FAA published a notice to operators in the Federal Register. The notice signaled the FAA's intent to require compliance with CFR Part 135 rules to ensure that passengers, transported by air, had the level of safety required of an air taxi operator. Many lodge operators and guides in Alaska applied for, and received, on-demand CFR Part 135 certificates. The Alaska Professional Hunters Association brought suit against the FAA, seeking relief of the Part 135 requirements. As a result of the lawsuit, guides in Alaska may still operate under Part 91 regulations.
The actual decision is available online at:
http://www.cadc.uscourts.gov/internet/o ... -1051a.txtThe way it reads, I have always assumed that the application of part 91 to businesses that are selling a tourism product that happens to involve a flight, but does not specifically charge for the flight but rather some other specific service or experience that is, in part, accessed by a flight, is not applicable to any other location than Alaska. The fact that the FAA had for 3+ years been telling operators here that they were covered by part 91, then changed their mind, was a specific set of circumstances applicable to this state, and the ruling does not appear to make any attempt to broaden it to other states.
So an operation like that in any other place might well be, in point of fact, a part 135 operation.