There are loads and I mean loads of "guides" now who are not full time...they have other jobs. There are loads of them who show up and then disappear just as quickly.I agree that it seems like it. However, if there were too many for market conditions, wouldn't guide fees drop? My observation is that guide fees have risen more than CPI inflation over the last 15 years. Or maybe your metric for ". . . too many . . ." is something other than supply and demand.
Certainly supply and demand is a factor in now many can actually make a go of it. Shoot I had a guide tell me recently that he thinks that rec floaters (guys with their own drift boats) should have a limit on the number allowed on a river each day because they were too many of them and the guides we getting overcrowded!
Well eff you buddy. You are making money off a public resource. YOU are the ones that should be limited.
Now all that said you are spot on with the cost of a trip these days. Shoot I head down to my winter home next week and my way pricey skiff looks at LOT more reasonable when the daily rate now is $800. Hell that's way more than a monthly payment on a brand new skiff....for one day.....LOL