To make it clearer perhaps to readers they will undoubtedly NOT be all from the STN fleet but from all bases as previous Winter`s when RYR have stored @ STN..As whitelighter states they are rotated in service & it is easier to achieve thus at the largest base.
Yes it will keep the tug drivers busy + the "rangers" providing escort together with ATC in continuous crossings of the R/W from Terminal to North side storage & VV.