Good job getting both sides done, it is a good practice. While you are at it though, I'd get the rear done as well. I don't recall ever seeing a service interval for the wheel bearings in the maintanence guide. Could be an oversight on my part though. There is a lot left out of the service guides though. My guess is that most people don't keep their cars long enough to really need these necessary services and that is why the MFG's don't put it in there.
On the other hand though, there are a number of us that tend to keep cars till the wheels litterally fall off. As in your case! I jest of course but I don't think important services like the wheel bearing maintenance, front and rear differential oil changes, believe it or not brake oil change, and the like should be left out of the service guide. Their hope is that these things will be taken care of by the service advisor if one takes their car to the dealership to be serviced regularly. Some of us can't afford that though and are "DIY'ers," but if you don't know to do these kind of things, how does one find out? As has been said, you don't know what you don't know.
I'm glad that you averted a near disaster, God was with you!