On the luckiest nights, large and medium sized trout move to the shallows, searching for an easy meal. Trout visit thin water because they feel protected by the cover of darkness, and because they find baitfish of all types unguarded and ready to be devoured. But this is also when trout are most vulnerable to the skilled night fisher.
I have a bank-first approach on most nights, hoping I may hit it right and find actively feeding fish near the edges. On some rivers I wade to the middle and fish back to the boundary. And where the water is too deep to wade the center, I may stay tight to the bank and choose to either work down and swing flies or work upstream against the bank and drift them. Regardless of the method of presentation used, bank water is my first target . . .