Green’s Dictionary of Slang

pitch n.3

[SE pitch camp; although Mayhew, London Labour and the London Poor (1861–2), apostrophizes it; pitch, ‘a spot in a street or other public place at which a stall for the sale or display of something is pitched or set up, or at which a street performer, a bookmaker, etc. stations himself’ (OED) has been SE since late 17C]

(Aus.) a camp.

[Aus]E. Dyson Fact’ry ’Ands 95: It begun et my little summer pitch up in the Clarendon Park.