Hi there, if you dont know the mark like the back of your hand I would certainly advise against trying to fish it at night!! Its catch 22 for you unfortunately, fish it at night with a headlight and risk spoiling the fishing which would probably happen and still be quite risky trying to limit the amount of light at a mark you didnt know well enough to fish in complete darkness. On the sewin rivers I guide, the terrain of every single beat is mapped out by individual guides (as we are all different heights and our individual steps vary) and noted on paper, access points, gravel beds, boulders, ledges/drop-offs, slopes location points etc are all thouroughly mapped. Lights are a deffinate 100% no go!! its all night fishing in complete darkness, as a guide I am responsible for the safety of the client and I need to know exactly where their feet are!! I sort all their tackle, leaders, tangles, changing flies etc and having done it thousands of times so doing it "blind" has never been an issue. But like I say, you need to know it like the back off your hand (even the access paths) to fish it 100%!! having doubt and worry about your surroundings will spoil your fishing and could be dangerous/risky. add a light source to the mix and your session could be ruined before even tackle up. Not trying to put you off or make it sound life threatening!!!! Just my personal experiences.I'm hoping to be fishing off of spits and around estuary mouths,not the safest of
places in daylight and the shoreline in general.
I may well visit other trickier marks as well,just like to stay safe!!.