Galaxies...even small faint ones...can be imaged very successfully from the burbs. Sky brightness per pixel is the key, and this is minimised by using long focal lengths. The native FL of my system is some 3300mm and it regularly pings mag 21 on nights of good transparency from the southern fringe of Sydney.
Nebulae are easy if they are bright, not so much if you want to do LRGB and they are faint little suckers...gradients can be problematic.....but if you are happy to go narrow band, there is virtually no advantage with a dark site. Get your self a set of 3nm AstroDons and even the full moon can be worked around.
