In my day we always did a dedicated evacuation trainer session before going away on a Ranger, with the Crew Chief(s). That generally covered us for the BTR requirements.
I well remember the comment of the late Al White when he was instructing in the OCU Groundschool that 'his rear crew never actually volunteered for one, or asked for one, even though they were the ones who had to do the gymnastics to get out'.
I did a Goose trip on 7th seat myself once, and certainly went through the escape trainer!