I won't often cast to one random showing fish , but if there is activity in an area or one fish showing in the same area over a period of time , even just 10 minutes then I'll put a bait out . You sometimes just go with your gut feeling .
I done a night last week and had one fish at 2am , by 1st light there where fish showing at the other end of the lake so I moved and in the last 3 hrs had another 3 fish .