I love it! Imagine a 25.6x25.6 km "island" of the area in and around Arnhem (Arnhem, Osterbeek, the Renkum Heide and all those famous places) where the events of Market Garden took place...
Of course, it would be difficult to have all of the allied XXX Corps and the 2nd SS Corps units there, but just as you say, with smaller amounts of units...
I recently read Cornelius Ryan's book "A bridge too far" and I recommend it to anyone interested in reading more about Market Garden.
Remember September '44