Do I need to repack or grease these bearings after install?

These are sealed units, so no repacking. The bearings come sealed for life — just bolt them on and you're done.

Will I need a wheel bearing press to install this?

No. Bearings are already pressed and seated in the hub assembly. You're just bolting the whole unit to the spindle with hand tools.

What hardware do I need to mount this?

You'll need the bolts and fasteners that originally held your old hub on — those stay with your vehicle. Bring a torque wrench and refer to your service manual for the correct torque specs on the mounting bolts.