Use the direct mount with cameras as well as security boxes. A fully adjustable ball joint allows you to to get just the right angle.

Designed for mounting cameras on walls, they have also been used for mounting temporarily to trees.  They are easy to attach with a good cordless drill and some self tapping screws.

The mount itself screws into the thread in the back or bottom of your camera and the correct angle can be adjusted forwards, backwards or sideways.  Once the mount has been screwed up tight (just by hand) it holds very well.