[travelin texans]

I recommend NEVER using the EZ lube system, others swear by it but most swear at it.
As suggested check the tire dates, I'd be more concerned with them as this point. Go enjoy your trip & care of the bearings when you return. There u tube videos with his to pack rv bearings using minimal tools, you will get your hands dirty, but this a maintenance item that's not difficult to perform & would be beneficial to you to know how to do it.