By removing the drive shafts you would be able to replace the bearings in site (without having to remove the hub) this way you will minimize the risk of damaging the ball joint rubber boot and the need to realign the rear axle.
You may want to borrow a wheel bearing removing tool or borrow a sledge hammer from Autozone (it will be a workout...)
Please note that the bearings have a magnetic strip on one end (for the ABS) and you want to install them the proper way, I learned about this the hard way..
Good luck