以下の英文についてお尋ねします。 onsen
A:Hello,.How may I help you?
B:I’d like to take a hot spring bath here.
A:Thank you. Could you buy a ticket at the ticket machine because the fee is to be paid in advance?
After getting it, please receive your shoe locker key at the reception and leave your shoes in a shoe locker,and then, we’ll give you a locker key and keep your shoe key while you’re in this facility.
Finally, please keep in mind that when you get out of the building, make sure to give your locker key back to our staff at the front desk .Then we’ll hand you the shoe key we keep for you.
we’ll give you a locker key and keep your shoe key while you’re in this facility.の部分はwe'll keep your shoe key while you’re in this facility in exchange for giving you a locker key とすることは可能でしょうか？
また、Then（文頭）なのですが、この用法は副詞で「そのあとで～をお渡しします」との理解でよろしいでしょうか？
意訳をつけて説明して頂ければありがたいです。
