Charging a friend for 'guiding' them on public land is an ethical dilema in its own right. No ethcis involved for guides on public land to begin with. Ought to be against the law, and Im for one glad it is beginging to in a lot of our public places.
But, and this is the sticky part, just cause your friend is a peice of crap, doesn't give you the right to be one back to him. 2 wrongs don't make a right. And if someone shows you a hunting spot, a fishing spot, a dog training spot, or any kinda spot or thing that is a realitve secret, going back without them is wrong. If they took you to some community hole, and just showed you whats up, welp, that different but at least a coversation is in order. But if they showed you something you would have never found except by time and dumb luck, you got no business sticking it to the person who showed you, guide or not.
Nothing ruins a good spot faster than sharing it with 'friends'. If i got a really good gig on private land, I still wont take a lot of people. Ive taken people hunting, who ended up trying to lease stuff out from under me. Nothing turns me off faster than taking someone somewhere, and the first thing they want to know is 'particulars'. who owns it, where do they live, how many acres do they have, yada yada yada... none of that is a 'guests' business. If i take someone somewhere they ought to be happy to be there... curoisty killed a cat, and its kept a whole lot of folks from being asked back, thats for sure. If someone takes you somewhere, just be happy to be there, do things there way, never even think about coming back, and pick up any trash you see. Not hard. travis