Sounds like a good plan - some notes:

1) Exactly. Yes.
2) There is also a rubber 'bearing mount boot' you'll want to replace. I'll send you the extra one I have, if yours is the same as my car ('83 SD) uses.
Also, I believe you need a big circlip remover for the bearing on your car; Stretch* can verify.
3) Motor mounts (on my car) are mounted with a large hex key; be sure you're ready with tools. Issue here is simply being able to safely jack and support the engine. Otherwise not a difficult job.
4) Same is true for trans - jacking and safe support. But you'll have to do this to remove the driveshaft, anyway. Trans mount is easy to replace; standard nuts and bolts.

1a)? One thing I regret not doing on the same project was replacement of the trans output shaft seal - and perhaps replacing/tightening the yoke nut at the same time. I just wasn't prepared with parts and tools for that; a shame with everything apart.

* I like the sound of AskStretch.com !!

__________________
'83 300 SD
'05 E320 4Matic
'06 BMW 530 xi
'68 Triumph TR 250 - The only car I ever loved more than the Mercedes; who needs electricity, anyway? - Damn, why did I sell it?!
'59 Jaguar 3.4 'Le Chat Noir' - Damn, why did I sell it?!

It's difficult to make predictions, especially about the future.
- Niels Bohr