REMSTARBC.ca    Rural Emergency Medicine Simulation Training and Resource - British Columbia

Managing Spinal Cord injury is a challenge in a rural setting as most sites
do not have a CT or immediate neurosurgical consultation.
The goals are to first recognize potential spinal cord injuries,
prevent further cord injury and finally to expeditiously medivac
these patients to appropriate tertiary care centers.

The issue of cervical collars has undergone a great deal of controversy of late.
For a review of some of the literature click on this site's link. 
http://remstarbc.ca/cervical-collars.php

The following video shows the proper technique for log rolling.
One thing that is not emphasized is that the person at the head who stabilizes the neck, should be leading the log roll.