I didn't remove the diff or disconnect propshaft/drive shafts when I did mine. Remove one of the rear mounts first, that will give you more movement to replace the front one. The rear mounts are pretty easy.
I did however remove the rear diff cover to drain the oil and have a look inside for signs of wear and ****e. Gave the inside a clean together with the cover mounting faces using white spirit and refitted using RTV silicone to seal. Have not had any oil seepage/ leaks 12 months later.
I removed the original LR front bush from the carrier and replaced it with a Polybush from Flo-Flex Polyurethane Limited which should last for years.