I completely agree with AA, foreign land-aways, and trails in particular are great training and if we aspire to having a expeditionary capability then we need the practice.
I do, however, suspect that the maintenance side of the house did not number 100, for if it had - it might be viewed as a little inefficient.
The point about warships is worth exploring. I remember being alongside in a Type 42 with a gun, sea dart and a helo. Next to us was an Israeli Sa'ar class with Harpoon, Oto Melara, Gabriel, CIWS and more HMG than you could count. We had circa 300 on board - I think they had 60! I'm pretty sure our helo had about 8 chaps to mend it, not the 240 this might suggest.
Have a good Sunday all.