Well at 82k miles on a 6 year old car you're already due for strut replacement, do all 4 at once so you only have to do one alignment afterwards and it will cost you 500 or less total.
That humming sensation isn't always wheel bearings, it can be a hub or even the tire itself. Inspect and rotate the tires when you do your struts, see if it makes any difference and see what happens, you'll figure it out sooner or later.
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