There isn't an elevation change enough to speak of here but I doubt ruffs move with the snow. In the many hunting stories of the last century or more, I don't recall wholesale changes in grouse location due to snow nor do I recall reading of any such happening in various biological reports. In fact, they actually need enough snow depth to borrow in to best survive the winter. As their winter food tends to be leaf buds off trees and shrubs with the most important being aspen and alder a distant second, snow would not be a major factor in their movement.
