I would just blow off a few ounces to get the sediment right around the dip tube, then rack it to another keg for transport. It should work just fine.
This is the correct answer! Don't mutilate your poor keg!
I agree. It's the easiest way to deal with the sediment problem. I used to do it that way pretty frequently.
But for the past few years now, I follow the secondary phase (yeah, I know...I still stubbornly do it that way) with a gelatin cold crash before
it goes into a keg, the resulting bright beer goes into the keg bright and stays
that way from the first pour right down to the last sad gurgle when it kicks.
That, to me, makes the secondary and cold crash phase before
going into the keg a very worthwhile bit of extra effort...especially when I know I have to take a keg somewhere or be otherwise moving it around. The little bit of extra work and extra time may not be ideal for everyone, but it works for me.
It also makes for very stable, conditioned, and sediment free beer to transfer to bottles too, when the need arises.