Two things come into play, the extra air fare to fly an additional 3,000'ish miles and once you land, how do you 'get there?' Then most areas will have a reasonably 'standard' Guide fee for a day/per person for a days trip.
On an 'per hourly basis' can that seem expensive? Yes, but remember he's the one who had to go bucks up for all the equipment, maintain same, etc. Worse yet the fishing season can be a very short term proposition in which to make a living. Entertain, educate the client(s), etc., and etc.
Add to that a lot of folks (Reg's permitting) will go with a Guide and learn the Public Access' and go on their own. Best trip I ever had (Deschutes River with Mark B) was a 4 day "all in" on the Deschutes River. Cost? About the same had we been in Alaska save for the airfare. Whole thing was total Bonkers; Charlie and I landed at least 25 Summer Runs each and who knows how many came un-pined?
In one perspective it was a 'Poor Mark,' two clients that just needed to be told 'here's how this water works' and we were Off to the Races. "I've got to show you some new water so lets motor down stream to one of my fav places!' We did, didn't do JACK. Hour later were into fish right out the front door of "The Di ke." What the runs called.
I think I hurt his feelings when I told Mark ''We don't need a Guide, just point out where and get your rod and go fishing." (Normally that's a total No-No). A 'You're kidding look?' Only way I'd have gotten away with that is I've known Mark for at least a Decade. He pulled a rod and off he went; and have it on tape, he hooked one after another, after another. Me Thinks he has a 'Secrete Rock' to stand on?????
Only other time Mark started the jet boat motor was to ferry me across river as I'm a terrible wader. From 65 on by balance has gone to hell in a hand cart. Never step into the water without a strong staff in my hand; ditto JD Jones. 'We is what we is' in our 70's.
Lots of still camera gear, but the best was the Video. Sent Mark the tape (think Sandy River Spey 'Clave Mark) and transferred same to a DVD. Crank up the Big Screen, DVD player, surround sound and right back in the day.
End Game is I've never figured out why anyone would want to be one.
Well .. Save for Mark ... aka flyfishusa
. Crud, reminds me I forgot to put in my order yesterday.