Agreed on lengthy idling however the manual states about 60 secs in winter to allow oil flow to the Turbo as it seems to make quite a play on this in the book
I also do a cool down after a run I let her idle for a min or so gives me time to open thw garage idle in and shut down. I know its overkill but its my first brand new Jeep and I'm a proud daddy

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06 Cherokee CRD Limited Automatic
97 BMW 750i

its always a good idea to let a turbo anything idle after driving, it allows the turbo to cool and prevents scorched bearings. They sell turbo timers for a reason. My friend owns two diesel suburbans, both are 6.5 liter turbo 4 wheel drive 3/4 tons, both are red with red interior. 1 is a '94 while the other is a '95. The '94 has 389,000 miles on it and was regularly used by his father's company to tow boats to boat shows. It has gone through 5 turbo in those miles because of burning up the bearings. The '95 was his father's personal use vehicle and as such got treated better. Now it only has 189,000 on it, but it has never had the turbo replaced because he lets the engine idle for 5-15 minutes after driving depending on outside temp, load carried, etc. In a gas engine you need to worry about fouling of the spark plugs as a result of heavy idling. Since diesel have no spark plugs, it is much safer to let them idle (how many times do you see semi's idling in a truck stop?). Save the wear on the turbo and let it idle. The only harm done is in fuel cost which is probably less then a new turbo as idling engines use very little fuel.

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'02 KJ Sport V6 4x4
3/8" Clevis lift
Rusty's 2.5 lift
255/70/R16 Fleet Farm All Terrain (yes they work)
Class 3 hitch
Hellas
Police Scanner/CB radio
LOST #: JH061986

Just start her up and drive like normal, no problem, the CRD does not need any special traetment, it is designed and tested in extreme hot and cold weather so there is no issue at all.
Just keep the revs low until the engine is warm, same as you would do with any petrol engine.
Enjoy your trip.

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The most repeated sentence I heard from my dealer was "I'm sorry YOU are not happy with our service" so it was still my fault.