风餐露宿

fēngcān-lùsù

[eat in the wind and sleep in the dew-endure the hardships of an arduous journey or fieldwork; go through the hardships of living in the open] 形容旅途或野外生活的艰苦

饥饭困眠全体懒, 风餐露宿半生痴。 --宋·范成大《元日》