Hi George,
Sadly, I've become quite an expert removing and installing the drive train with the tub in position.
I've removed each part and reinstalled. I've removed the bell, transmission, and transfer case fully assembled. Both approaches have obvious advantages and disadvantages.
I finally spent the money on a Harbor Freight tranny Jack. This made the full assembly approach much easier to manage when working by myself.
Weight wise, it's fairly easy when installing each case separately, but the fork and bearing spring are tricky. I used long needle nose pliers for the bearing spring. I used this technique to install the fork.

Works like a charm. Leave the twisted wires long. Push bearing forward. Slip fork in to position. Then untwist the wires and pull them out.
For the splines...use a generous amount of Permatex 2. Let it set up for a day or two before driving.