I carry a SAM splint primarily to use as a C-Collar if necessary. That is a hard one to improvise with "creative" techniques. Not that it can't be done, but neck stabilization is pretty important. I've seen several broken cervical vertebrae walk into the ER, so it is possible to break your neck and get up and walk away. However, the neck is unstable and the wrong move could end it all. If you're going to walk someone out of the woods when you can't totally rule out a neck injury, c-spine stabilization is important.

MNS
_________________________
YMMV. Viewer discretion is advised.