How many of you grease your own trailer axles?

I have a HQ15 Black Series travel trailer and I am in the process of converting the hubs to an oil bath bearing set up. Due the amount of miles traveled and weight #5200. From what I been advised its good solution to the joys bearing packing.

https://www.etrailer.com/Trailer-Bearings-Races-Seals-Caps/Kodiak/XLPROLUBE1980KIT.html