I just repacked mine...It is a very easy job.

Unbolt the tire.
Take off the 4 bolts holding the bottom ball joint.
Remove boot (I cut both of mine off).
Clean out the CVs.
Remove C-clip.
Pull out CV from the Green Cup.
Remove snap ring.
Grease cups/bearings.
Slide new boots on.

If your joints are in good shape, and your are not down for a little grease and sweat, I'd have a mechanic repack them...