I just did my bearings the other day. I have the EZ-Lube axles on my 2011 KZ RV Coyote Lite CL164. Let me tell you that even with me only put 3-4 pumps of grease in them last year to tide me over forced grease out from the rear grease seal. The best advice is to learn bearing repacks and DIY. Forget the EZ-Lube or bearing buddies. My grease barely seeped out but further or excessive greasing could have contaminated the brake linings. Grease is not the only issues with them, you have to look at the races, bearings, seal (replace) and the looseness after they stretch/wear a bit. Those issues will cause uneven tire wear, wobble, uneven loading, etc.
The repack only took me about 30 minutes per side, a new grease seal, new cotter pin and grease. Yes, it is messy but use clean rags or paper towels and gloves. Change them often and you'll do it in no time. Best of luck.