Looks like a lot of effort but the result is class.
Rather over-engineered, but (as with so many builds) I was making it up as I went along.
I never tyre reading this thread.
Tread carefully.....

Meanwhile, back at the bus...
I've sculpted the (partial) body of the driver, adding a spare Crooked Dice head I had:

Supplies for the bus interior:

The boxes are a single piece of blue foam cut and painted to look like a pile of boxes. I added some fuel drums (roughly cast in plaster years ago) and a putty sheet. There are a few more loose items currently being painted.
Bus exterior:

More ProCreate for the sheets that hang from the side of the bus. They have been sculpted onto thin plastic card as my intention is to make them removable for when the bus drives off.

The sheets, along with a (removable) plastic card shelf and a rope ladder (galvanised wire mesh). Base colour finished on the bus body.