Hey Eric,
Welcome to the forum.
As to the value of your opinion -- I'd place it pretty high as you're a guide, and have some real facts and figures to add to the discussion.
$225 x 120 = $27,000 gross. Some folks get it in their head that $225 for a day is a lot of dough, maybe more than they make in a day, and stop thinking there. But I know it's not gonna make anybody rich, and it's hard work.
The way I look at whole thing is this: I work my tail off 49 weeks a year, and most of the other three weeks are spent doing non-fun stuff, so my time off is precious. Hiring a guide can be a great investment, even though at the end of the day I don't own anything new. The experience, the memories and the knowledge are what I get out of the deal, and I've never regretted it at all.
If a guide busts his hump for me and/or my kids I'm gonna show my appreciation for it with a tip. And there's a lot more than how many fish are caught in my equation.
As an example -- last summer we spent a couple days in Smoky Mountains on our way to SC. I hired a guide for my two boys and I for a day, hoping to make the most of the one (freakin) day we were going to get to fish there. It rained big the night before, and a good part of the day we fished. But he busted his hump driving us around the park trying to dodge the storms and find places that weren't blown out. He worked well with the boys, and taught me a thing or two also. During the long periods when we weren't fishing, he kept us entertained with stories about the locals, and the history of the area. I ended the day with 2 or 3 fish. Not only did I feel like I got my money's worth, but I felt he had done the very best he could have under crappy conditions. Ca-ching: he earned a nice tip. And we got a lot ourselves.