firstly i take it you will be night fishing for them?
you can use alot of different methods that work.
depends what depth of water the fish are in for what type of line to use?
a surface lure on floating line can work..
also tube fly,s,medicne e.t.c. will all work...
the most important is to get the fly to the fish at a correct depth and speed...
intermediate,sink tip lines can help ya achive this.
also weighted fly,s...
so really just get your fly to the correct depth and present it in a natural manner...
regards SS