Rovers were unchanged for a third successive game in the 3-0 Boxing Day defeat at Fleetwood Town, a result which ended an unbeaten eight-game sequence.
But there will be changes at Gillingham, the third of four festive games in 11 days.
Tommy Rowe and Alfie May are likely to come into contention for a start, while McCann hopes Matty Blair will recover from a bout of illness to fill in at right back.
'The team hadn't lost in eight games, predominantly the same team,' said McCann.
'Hindsight is a wonderful thing isn't it? I probably should've made changes, I don't know.
'That team deserved to start again.
'We'll definitely freshen it up for the next one.
'It was the Gillingham game I was thinking about the number of games in quick succession. We need to keep the energy in the group.
'We've got a good squad and people are ready to play.'
Shaun Cummings (groin) is a major doubt and Niall Mason and Joe Wright remain sidelined.