On the visual side of things.....
We have to have two way radio contact with the ground.
They have to look for wires, obstacles, wind direction and a suitable (100x100ft) landing zone.
If possible they will spotlight what they believe is the highest/most dangerous obstacle for us.
We circle the LZ until all satisfied that every obstacle has been identified.
We shoot an approach to a point in space 3-500 feet agl and set back on the approach course in. (power rechecked for lift ability)
The cockpit is sterile, breaking squelch or voice is a stop sign.
The approach is crabbed in for slightly better vis for the pilot.
Once on the ground we use the nightsun to look again for obstacles on the departure path.
A set of eyes is used to guard the tailrotor from personel.
The departure is actually a reverse of the approach until passing the single engine flyaway point. If we have any problems up to that point the acft goes back into the LZ (and the nice helpfull rescue type people there)
Past flyaway single we rotate forward and depart.