600 miles is only a couple of Sunday Rideouts.
Got my new bike delivered on Firday and booked it in for 1st service in two weeks time - would have done it next week if they could have fitted it in.
What do you need to get to know exactly, the gears, clutch and throttle are all in the right place, you may struggle to operate the indicators and tend to beep the horn instead - but in many parts of Europe your better off swapping indicator use for mucho beeping anyway.
I assume your having BMW luggage so that will be fitted when you collect the bike so apart from knocking up a few hundred miles not much else to do.
When changing bikes I try to get a little weekend away before any big trips just to get hang of loading up luggage, check Comms system, ensure comfort is OK etc. but would not think twice about doing a trip just after collecting a bike if thats the way the dates worked out.
If it don't turn up in time go and rent one and send the bill to your lying stealer
I did a deal on a bike the last working day before going on Holiday and arranged for delivery the day I returned - all went well, the bike turned up on time, with the extra's I asked for fitted (Free of charge) and the delivery was FOC along with the first service - obviously this was not a BMW dealer