Flaming Star nebula IC 405 in Auriga. G and H in the trap. Simeis 147 in Auriga. I've kind of given up on the Witch head until I get to darker skies.
The brighter parts of IC 405 should be doable under a fairly dark sky in a 12 inch if you use an H-Beta filter and at least possible using a narrow-band nebula filter. It isn't much, but the H-Beta at least should give you a fighting chance at seeing it. I can see several of the inner filaments in IC 405 in my 14 inch with the H-Beta (52x), but they are pretty darn dim. On a really dark night in an 8 inch f/5 equipped with the H-Beta, I have occasionally seen the very faint band of nebulosity that is west and extends well south of AE Aur (1.3 degrees in length). Good luck and clear skies to you.