Disaster recovery services are a great help. The ability to restore maps, photos and documents that have suffered water or fire damage can avert a number of headaches as well as disappoint.
However, while many disaster recovery services can perform amazing work, there will be certain limits to the amount of restoration the service can provide. Document recovery services can often correct problems that would seem dire but they can not perform miracles.
For instance, a photo that has been burned over 75% of its surface is beyond the point of salvaging. That said, it is also important that people not make assumptions as to what can or can not be recovered. The lay person simply does not have the knowledge to ascertain what can or can not be repaired using the latest technology available. Throwing out everything that seems damaged could being doing yourself a disservice. Instead, consult with a recovery professional as soon after damage has been done so that they can quickly assess the situation, collect the materials and determine what can or can not be saved.