This subject has been beaten to death. Remember when cars front wheel bearings had to be repacked ?. They were typically done when the brake pads/shoes were replaced, around 20-30k.
I believe as long as they are repacked CORRECTLY you should be good for years to come only pulling your unit 3-5k per year (like most of us). If you are towing 10-20k a year then I can see doing it more often.
I think most people are spending way too much $$ and time worrying about the repacking issue.
I would however make shur they are packed correctly with in the first year of ownership. We all know how the manufactures like to cut corners.
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