Here's a unique approach to avoiding some of the challenges to 3D Printing with Wood: Don't put any wood in it at all!
Polymaker has developed a wood like filament. This is a porous PLA. The porous nature results in a wood like feel and a very low density.
You can print it at standard PLA settings 175-220 or so. No heated bed required.
We've also found that this material can be smoothed with acetone vapor.