Green’s Dictionary of Slang

carra n.

also cara, carrer
[abbr.]

(Aus.) a caravan.

[Aus]Baker Popular Dict. Aus. Sl.
[Aus]Courier-Mail (Brisbane) 13 Dec. 4/4: A portable stove will solve heating problems. Safe, economical appliances that can be used in a cara kitchen, or out in the open.