I have limited experience with the washing, but from what I understand, you can do that but will have trub. Now, on the bright side is that you can always let it settle and then "wash" it a second time when you get to where you normally brew. I washed some yeast that I got from a local brewery and it came with more trub than I wanted. I just gave it a couple of rinses and tossed it into the fermenter.
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