Yes, I have Gatherer. Gatherer displays all possible mine/herb nodes, not just the ones that actually exist. The WoW API makes it impossible to see what nodes actually exist unless you are tracking them yourself. So yes, I could see if there might be a herb/mine node somewhere, but then I still have to squint over at a tiny minimap on the opposite corner of my other monitor. Which is what I'm trying to make easier.

If you have a version of Gatherer that displays actual existing nodes of a tracking type you do not possess, I would love to get a copy of that!