Campbell-Ryce limped out of last Saturday's narrow win over Swansea just after the hour mark with a hamstring injury.
Ivan Sproule impressed after coming on to replace him and will now be pushing for a starting place.
Goalkeeper Dean Gerken should come into contention after recovering from a collarbone injury but he is unlikely to replace Stephen Henderson, who kept a clean sheet against the Swans.
Meanwhile, long-term absentees Jamie McAllister (calf), James Wilson and Jamie McCombe (both knee) remain on the sidelines.
The in-form Robins are looking to extend their six-match unbeaten run under caretaker manager Keith Millen which has seen them move to within six points of the play-off places.