IF......

Kiwi I would take the truck to good 4wd mechanic sothern syd the 4wd service centre at taren point on the nth side the traction 4 at artarmon.
The will do the complete service and well.

All the best
Eric

Kiwi go from the front to rear and check every thing from your list you will be covering it all.

Have a good one
Eric

If your having the radiator flushed get them to fit new hoses all round and give you the old ones back. That way you've got a spare set that you know will fit in an emergency,

Kiwi,
I think Eric is right....take it to the experts, they'll know what needs to be done/checked. By all means, ask them first what they plan to do and how much they'll charge you.....if they say they're gunna do something you've already done (eg: change the air in the tyres) then tell 'em to knock that off the list.
A lot of the stuff you've mentioned (eg: check suspension, check engine mounts) should be things you could and should do yourself on a regular basis. I love spending a bit of time on my back under my rig. I'd much rather do it in my drive way and have half an idea of what's right and what's not. Then, if there is something nasty happen on a trip, I'll have at least half a chance of climbing underneath and seeing whats been moved or dropped off etc.
To leave the WHOLE job to the experts might not necessarily be the best thing in itself, but I'd get them to do the tricky bits.

Don't forget the door hinges - the squeeeeal can get pretty annoying after a few days, unless you pack the CRC, RP7, graphite or whatever you use to make things slip (wonder if KY would work LOL).

Also, as with the hoses, get the accessory drive belts replaced (or do it yourself) and chuck the old ones in for spares.

Finally, don't stress too much about it. Murphy's Law says that the one item you miss will be the one that fails. I once took a 1949 Fargo ute up the Murray, and had spares for just about everything - even a spare gearbox. Only problem I had was a stripped diff, and that was the only spare I left behind!!

Cheers
John

I dont know what a 100 series is worth but surely a factory workshop manual would be at top of the must buy list.
It contains all the requirements and the periods in between.
Compiling information this way,even with everyones good intentions,can still lead to something important being forgotten.
On a long trip its wise to take a manual if only for parts identification and the troubleshooting guide.