Where were you able to find dark sky? there is no place near me that does not have tons of light polution
25 miles out of Springerville in the AZ desert. The sun sets around 5:45 and by 6:30 it was nearly black. I started shooting around 7pm.
Also important is a night with less haze/particulates in the air. Typically, the best conditions are right after a cold front has cleared an area. This often leaves clear, clean skies which allow more of the light through. (Every now and then, we see a night like this, when a laser pointer is nearly useless because there's just nothing in the sky for it to illuminate when using to point out celestial points of interest.)
Another way to improve is to go to higher elevations.