You will have to coordinate with the host when you want to access the space.
We have an attic over our garage. You enter from the inside of the garage with a pull down ladder. Great or storing boxes or light furniture like cribs or chairs. If renter is able to properly deck the space, I will deduct cost and time from rent. It is loosely decked now. Just some planks of wood laid in a way that allows someone to carefully walk around and store things. Ceiling is arched so there are parts where you can stand up and parts where you can’t. I will have a few boxes of my own up there off to the side leaving plenty of room for you to store whatever would fit through the pull down attic ladder/door.