If you have carpeted floors, or a piece of carpet remnant or other soft material, flip the subwoofer on it's flat side to move it into position during the "subwoofer crawl" , makes it easier if it's a heavy sub. I would never do that because there could be something sharp or abrasive in the carpeting to scratch the finish of the sub. Moreover, I think you got it backwards. If you're doing the subwoofer crawl you only move the sub once...to the main listening position. Then it's YOU who crawls around to find what spot in the room the sub projects to best, then you put the sub there.
