On this particular trip we fished from about 730pm til 730am ... we did not anchor or tie off, but simply went from brushpile to brushpile and flipped jigs over the top of (and sometimes down in) them, whenever we saw fish on the Livescope. We tried this same process last year, about this time, but on a relatively moonless night & could not find any fish on brush during the night. We just wanted to see if the Full Moon was a positive or negative influence. The jury is still out, but we did find and catch quite a few fish during the overnight hours.
I have been known to tie off to standing timber and use minnows under lights, either straight down off the side of the boat or with a float & pitched out to the edge of the light being used. Straight down using a gas lantern (in my youth) and a float on the edge of the light using a floating 12v headlight in my middle age years.