If you don't have the tools to do the rear axle bearings, I'd let a shop do it. I borrowed the tools from tpr103 to do the rear axle bearings on my '85 and it wasn't bad, but without those tools, I would have been fighting it for hours. He had a slide hammer with the attachments for pulling axle bearings, then the inserts for tapping new bearings and seals back in. It was a PITA doing it on the ground with taking the cover off with that stinky gear oil lol.

Upgrading the LS clutch packs is a good idea while it's opened up. I've never done them before though so I can't help you with the difficulty level on that one.