I grease mine once a year just prior to the first trip of the season. Been doing that, and only that, for 3 campers for over 12 years with no other problems. Some people I think go overboard by repacking; unless it is "heavily" traveled in salt and water, I don't see the need. Repacking trailer bearings are more for boat trailers being exposed to submersion or heavy loaded(usually overloaded) long haul trailers usually not pertaining to campers IMO.
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2013 Jayco Eagle 324
2007 Dodge Ram 2500 Cummins
2016 Ram 2500 Cummins Outdoorsman
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