VB,
I know... I am a real pussy . Once you hit 50 you really don't want to deal with all that unpleasantness for long duration when you don't have to. (Ie no one is paying you) I don't care what others say about me. If I did, I would not be here.
I would bet you could leave your name and cell phone number with these guys and tell them if they have any last minute cancellations or open spots and the weather is decent, to call you and that you will drop everything and go and pay cash. Don't call them, go and speak with them face to face and tell them how serious you are. Leave them your contact info for them to keep on file. I bet you would get your fill of canyon trips each year.