There will be at least one League 1 team in next round (either Derby or Barnsley), but I cannot see more than 4 or 5 of our teams competing in Round 4.
The odds will probably say that FGR, Oxford, Sheff Wed, Shrewsbury & Portsmouth will be eliminated this round. But the World Cup has shown that shocks are not uncommon, so I would not be unhappy if the odds are proven wrong.