As a chemical engineer who specialized in adhesive bonding, I can tell you that bonding metal to anything is tricky if you are depending on the bond for structure. There are many variables including the design of the joint, surface preparation, properties of the adhesive itself, curing procedures, thermal expansion characteristics of the two materials after curing, etc, etc, Aluminum is particularly tricky--aerospace companies take elaborate precautions to properly prepare aluminum surfaces for bonding and to control the bonding and curing processes. Aircraft homebuilders do not generally have the knowledge or the means to control all the variables.
I personally would not depend an adhesive bond between metal and wood for anything as critical as a control surface hinge or control system component.
Of course, there are other reasons to apply an adhesive between a metal part and a wooden part. One good example is to seal the gap between the two to prevent water from being retained in the joint. Another good example is to "bed" the metal part in place using an adhesive, thus taking up any gap between the two and preventing the joint from loosening or "working" in service.
However, in all these cases, I would want the structural attachment between the metal and the wood to be via bolts or other mechanical means.
Hope this helps!
G. Michael Huffman
SportAviationSpecialties dot com