If it does turn out to be Dover ,Hayes and Woking coming down, I expect them to drop in to the feeder Leagues as follows :
Dover to return to the Doc Martens, as they originally came from the old Beazer League.
Woking and Hayes to return to the Ryman ( both former Isthmian Clubs). This will make the Ryman one Club too many so expect the most northerly Ryman Club, St Albans or Bedford or Hitchin to move across to the Doc Martens.
They will then be one too many so, possibly Ilkeston will move to the Northern League. ( Bloody ridiculous them being in the southern League anyway).