Forward facing and cover the w/s, and headlights. I covered mine with cutout circles cut from an old corrugated yard sign. Used 2" blue painters tape to hold them on.
I agree with all the above. I have trailered Model A's for over 24 years always facing Forward. My trailer has a large deflector dam in front which prevents damage from flying objects. I have trailered Model A's as far as from Texas to Georgia and Maryland to Georgia.