If you don't want to bake the positioning data into your camera.cr2, then you should be able to construct a pose file that will position the camera relative to the hand, and do the smart-parenting.

Load your original (none smart-parent) camera figure. Set the Figure Parent to be the rHand (orlHand) of the character. Position the camera in the hand, as far as reasonably practical, use translations of the BODY to do this, but if you encounter gimbal lock problems use rotations on the BODY's immediate child to overcome them.

Now you need to save a pose for the camera's current translations and rotations, that includes data for the BODY actor. In P7, I think there is an option to include BODY data, but in P6, I have to use a Python script to accomplish this.

Lastly edit the pz2 to add the smart-parenting line to the BODY:

actor BODY
    {
    smartparent rHand
    channels
        {

Applying the pose to the camera  should smart-parent it to the hand, and set the transforms to correctly position the camera.

I'll demonstrate this with examples. Attached above is "Stupid-Camera.cr2", this figure is not smart-parented, or positioned to fit the hand, it is parented to the UNIVERSE same as any normal figure. In my next post I will attach a pz2 to smart-parent and position it.