I re-pack mine periodically; only issue I've had is losing a buddy but I found it quickly on a walk around and had a spare so no harm.
I carry a small tote with bearings, seals, grease, and other essentials just cuz. I was stranded once up in western Ontario when a buddies trailer had a bearing failure and there wasn't a part to be had for 100 miles...no sir, not me.
Mike