Just wondering, are YOU installing the wheel bearings or do you take it to a shop ???
Running in Sand ???? Fording Streams ????
Properly Installed Wheel Bearings should be trouble free for many miles ,unless you have a lot of wheel hanging out and adding extra load to the bearings.
My Daughter has a 04 Liberty, no wheel bearing problems (stock Tarz n wheels)... But she has had trouble with Bushings going out on the front Susp..
She has the dealer fix it and I think she's buying a few parts she doesn't need.