Mine recently traveled from KY to CA, some 4K miles and it had 20K more than yours does. I would not worry much. 75K on a bmw is nothing. The list looks pretty good. Diff / transfer case fluid - recommended change is 100K, same as spark plugs - you could do it early and it would not be a bad idea, but not sure that is needed. I have not changed mine yet. I would not swap trans fluid at 75K personally.

What I would consider doing:
- fuel filter
- radiator hoses and expansion tank (common failure items and relatively cheap to swap) - replace fluid while you are at it since the system will be open anyway
- serpentine belts

And then for oil, air and cabin filter, brake flush - go ahead if this is due within 5K miles, otherwise don't worry bout it.

And checking CV boots, brakes, all hoses - excellent idea.

I'd wait till 100K for the plugs, driveline fluids myself. Except transmission - I don't see the need to go against BMW's current recommendation to leave the original fluid in there.

Oh - and have a fun trip!!

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2003 4.6is - SOLD
2003 M5 Imola
2008 Mini Cooper S
2011 Mazda CX9