We haven't use rosbag (yet) for the Parrot S.L.A.M.dunk.
Recording should be possible.
However, replaying, things like the SLAM or depthmap is not possible because these algorithms aren't fed by ROS but by the cameras directly. Reasons for this are multiple, we could say performances but I think it mainly comes from the fact that we weren't using ROS at the beginning.
Do you have something in mind to record?
If you are working on an algorithm that needs 2 of the slamdunk_node topics, I think you can just record these 2 topics with rosbag and replay your algorithm with the bag.