A few years ago there was another thread on here that asked this question.

I recall those responders saying that if they locked in the diff lock while on SF1 it would hold the line pretty darn well and they would only need to put markers down during the last pass of the day so when they started the next morning it wasn't all huckered up.  I would agree though that any kind of stoppage that's longer than 15 minutes will probably require you to shift the line