Wayne:
Three logos is about enough, I think -- one cap, one shirt (your cap and shirt may match, but perhaps not from the same course), and perhaps a few bag tags.
I'm of two minds regarding bag tags -- some hate them, but I think they are OK, as long as they are not obnoxious (e.g., I'd think you'd have one for either Merion or Shinnecock, given your affinity for those courses, but someone with a stack of them -- along the likes of Pebble, the Bandon courses, TPC, Whistling Straits etc. etc. to me is just showing off). I keep two fairly obscure Scottish ones on my bedraggled bag, just for conversation, and permanently removed my one from RTRJr.'s University Ridge near Madison, WI, because I don't think it's that great of a course. But I will proudly wear my nine-hole muni golf course hat on the upcoming Langford/Moreau tour in Wisconsin, as well as my high school hat and shirt.