DWB nebulae seem rather ill-defined. But for the Propeller Nebula, DWB 111, I've never really been able to see them as but a bright area in a much larger HII filled field. In the case of DWB 18, there are some nice dark nebulae crossing a slight brightening of the huge emission nebula that occupies much of Cygnus. DWB 18 is located about in the center of the great dark rift that goes down much of Cygnus. It makes for a pretty field thanks to the dark lanes. I found no entries for any of them in SIMBAD though a rather bright area toward the left side of the image is listed as a dark nebula, DOBASHI 2314. The only obvious feature that can be identified is the cometary nebula toward the top of the image, GM 1-27. It has a red blob in it if you look closely. This is the Herbig-Haro object HH 214. Look on the nebulous arc halfway between the star in the arc and the one to the upper left.

14" LX200R @ f/10, L=4x10 RGB=2x10, STL-11000XM, Paramount ME