Green’s Dictionary of Slang

camp v.1

[camp n.1 ]

(Aus.) to rest, to lie down.

[Aus]Bulletin (Sydney) 29 Aug. 12/4: He was ‘camped’ on a seat in the Park – it was 9 a.m. – eating crusts out of his hat, and his moustache was as fierce, and his front tooth as ferociously prominent as ever.
[Aus]R. Park Poor Man’s Orange 247: Mumma loved to camp after dinner, but she didn’t often get the chance.

In phrases

camp down (v.) (Aus./US)

1. to rest, to lie down, go to bed.

W. Colton Three Years in Calif. 310: I have seen this savan camp down and snore soundly through the night [DA].
[US]L.M. Alcott Little Women II 100: I’ll be hanged if I don’t make them buy every flower she’s got, and camp down before her table afterward.

2. to die.

H. Lawson ‘Dust Thou Art’ Prose i 325: 1 can imagine [...] the chaps rubbing their hats off, and standing round looking as if it was their funeral instead of mine, and one of ’em saying, maybe, ‘Ah well, poor Jack, he’s camped down at last!’.