Tipping a guide working at a lodge (like mine) should always get a tip if they try hard and do a good job,,,,because they work for the lodge and not for themselves. Same for a waitress.
But a guide?

Guides that run their own business set their prices and should get paid based on the price they set, why would you tip a guide that is charging you $225.00 a day and it is his business? All the money is his. He sets what profit he wants by the price he charges. If he expects a $25.00 tip then he should charge $250.00. That $225.00 base fee says "I am taking you fishing and will do everything in my power to catch you fish"
Your tip to him should be a returning customer or word of mouth to use that guide.

Before you flame, I used to guide in the 80's and never accepted a tip. My job was to give the client the best experience I could for the price I charged and I did quite well just with the base fee.