General aviation rotor wing pilot reported having a near miss with a UAS during cruise flight.

Narrative

Night flight as pilot flying; PDPIC (Performing Duties of Pilot in Command); commercial training cross country. 5nm SW of KBDN; approaching location from the north; no local towers or buildings nearby. Roughly XA:30-XA:45 PST. Saw a drone at our altitude with minimal green lighting; no anti collision lights. I did not see them until they were less than 1/2sm away. As PIC I chose to deviate course while verbalizing the hazard. There was no traffic alert and proper evasive action was taken. They passed an estimated 50-60 ft. (or less) off our right side at +/- 5 ft. of our altitude. Upon confirming my aircraft was safe from the hazard; I noted our altitude and conferred with my passenger about our estimation of the horizontal distance. We proceeded to our destination without further problems. I believe the person flying the drone created a dangerous environment by not complying with Part 107.29 rules for drone operation at night. Prevention of recurrence of this situation would be if the person was found; recurrent training and proof of installation of proper anti collision lighting. Overall; requiring adsb-out for drones capable of reaching higher altitudes would also help prevent recurrence.