Caskey picked up an ankle injury, while Baraclough damaged ligaments in his knee and they join Danny Allsopp and Stuart Garden on the sidelines.
With both of those out, Notts are likely to name an unchanged side from last weeks 2-0 win at Cardiff, and rightly so after a brilliant performance at Ninian Park.
Willis Francis is back in the squad after recovering from the hip injury he picked up against Luton at the start of the month, he should be on the bench.