Today I'm working on a presentation and came across this file that I had saved a while ago:
http://scholar.lib.vt.edu/ejournals/JITE/v33n2/gregson.html
There are some good ideas to consider in the assessment of safety texts and education programs. This is one quote:
The first and perhaps best control alternative is to attack a hazard at its source … The second alternative should be to control the path of the hazard by erecting a barricade between the hazard and the students … The third alternative should be to direct control efforts at the receivers, the students. (Firenze & Walters, 1981, pp. 3-11, 3-12)
For example, machinery and tools can frequently be insulated or muffled to reduce decibels so that the noise is controlled at its source or along its path rather than at the point of hearing. It is the position of the National Safety Council that engineering controls are more effective than PPE when it is possible to implement them, and future workers need to be aware of such engineering possibilities (LaBar, 1989).
Level of consciousness shouldn't be the criteria for moving a patient out of a tree.
Would we expect an EMT to do their own tree work? Why are we doing their work without taking their training?
Doing a proper head to toe patient assessment is the first thing that should be considered. This skill is learned in proper advanced first aid classes.
I would urge caution before deciding to move a patient. Talk with the people who train the EMTs in order to develop a proper protocol. I'll bet that you'll find that they would want us, as rescuers, to get to the patient and get ropes set in case we need to get an EMT into the tree to help with the stabilization or transport.
Depending on the triage [tree-age...

] decision, the patient might be better off in the tree. I believe that it is SOP to put on a neck collar before ANY patient is moved. Does anyone know how to install a collar, much less have one on the truck?
The first step for good AR would be to have a pre-installed access line or throwline in every tree. Sure, this might get in the way and be a nuisance but it will save valuable time in the case of an AR.
Tom