What preperation work has been done on the truck?
I usually swap the main hoses, belts, thermostat, starter contacts, alternator brushes, brake pads, and then keep the old ones (as log as they are servicable) as spares. The belts and hoses OK from Milners, but the contacts and brushes will need to come from Toyota.
Take a full set of fluids and filters for a complete change - you should be able to get more filter enroute cheaper. Also take a container of Toyota coolant along just in case.
Depending on who has done the prep work, I might be inclined to take along suffient grease and seals for rebuilding the front knuckles - if Milner inner axles seals have been used I doubt they will last the trip.
The key thing is just to make sure the truck is 100% before you leave.
I hope that helps.
- Specialising in Land Cruiser preparation and servicing.