Once you get off the bus, please make sure to give your ticket stub to one of the staff members.
Once you get off the bus, please give your stub to one of the crew.
「バスを降りたら半券をスタッフに渡してね」は
❶Once you get off the bus, please make sure to give your ticket stub to one of the staff members.
*丁寧な言い方です。
❷Once you get off the bus, please give your stub to one of the crew.
*シンプルな言い方です。
スタッフ(複数)はstaff, crew, スタッフさんはstaff member, crew member です。
他にも:
Before you ride on the bus, please give your luggage to the crew. (バス乗る前に、荷物をスタッフにあずけてください)。
Before leaving, don’t forget to retrieve your luggage.
(帰る前に、荷物を取るのを忘れないでください)。
〜と言えますよ。