Funny... I replaced both front wheel bearings today. My WJ has 130k on the clock and was def showing signs of bad wheel bearings--vibrations, shaky steering and making the classic womp womp womp noise when in gear. I'll give you some tips:
The 36mm nut was not the worst of it, tho my impact wrench couldn't budge it but I used a breaker bar. Keep the vehicle on the ground, it allows you to use the weight of the vehicle as leverage.
PB blaster, PB blaster, PB blaster. Those 3 12pt 13mm bolts that keep the hub on were a pain. Patience is key. Again, breaker bar proved better than my cheap sears impract wrench (rated for 150ft lbs)
The job is definitely doable alone, I did mine by myself and only dropped the F bomb 5 times (Mostly at the hub bolts).
Good luck. BTW, Steering feels 10x better, womp womp womp noise is gone and it rolls down the road a lot smoother after replacing.