Your equalizers will only wear out if you haven't already replaced the bolts with wet bolts, and decent bushed equalizers like the EZ-Flex from Dexter. They should be standard equipment.I agree 12mo/12k miles seems a bit much to go by the book. Although I do believe the first repack and inspection is important on a trailer. Once you know it is done right I would also let them run for an extended period. I did my first pack at two years and needed one bearing that was light on grease. Then I went 10 years and put in new bearings when I switched to disk brakes. Old bearings and grease looked fine when removed.
What does it take to switch to disk brakes?
I tow a flat bed trailer. The brakes had stopped working on that, when I tore into them I found that they had rusted badly from driving on salted hi ways. I replaced them with new assemblies. Not very happy with the type of brakes that they are.
Dusty