For Saturn 1:00am is best as it is very low and that's when its at its highest. Jupiter was around 11:00pm, I started as soon as was able to align the scope as it's well past opposition.
At the moment three is no true 'astronomical darkness' until late August here, so for DSOs you can only really get images between about 11:30pm and 2:30am.
By September you can start early and go to bed at a civilised time!
Neil