the ideal night in my opinion is no moon,overcast,a nice bit of breeze (use it to your advantage) and a slight misty rain,this is where i found my best results in the past. For example i went out monday and it was the above conditions and i seen atleast 7-8 bugs,i went out another 2 times through the week and it was basically still with no moon and i didnt see one bug what so ever.
atb
brad.