I have always re-packed my fifth wheel bearing once a year. I pull my 12,000 pound trailer about 6,000 miles per year. I have done this for years but others say they re-pack every 2-3 years or 15-20,000 miles and have no problems. I would be interested in knowing what most of you do. Also a lot of my friends are using buddy bearings and just being real careful to not over pressure and get grease on the brakes. I use them on my trailers that do not have brakes but not do not otherwise. Any experience on this?