Lowest common denominator training is always the best thing, and for helicopter entry and exit, regardless of type, that training should simply be:
NO ENTRY or EXIT permitted without a thumbs from a member of the operating crew.
Crewmen and non flying pilots are trained not to give such permission until they have positively checked with the flying pilot. In this way, the operating crew always have positive control over the pax, and regardless of type, the crew can indicate the prefered entry and exit directions, and the flying pilot is kept aware of the fact that live cargo are involved.