Went out Saturday and got to watch one howl at is from 400 yds away that was cool. Are you using more vocals or prey distress at night? We did 4 sets got responses at all four but nothing coming in.You don't need to do it in the dark at all. In fact, if you go the reflective route, you need some light shining on it.
As far as scope adjustments, it depends on the scope, but most are done through an on-screen menu. Even on thermal scopes that have a "traditional" scope look, the "turrets" are not used for reticle adjustment. Instead, they may be a battery compartment or a menu selector knob.