Item of camping equipment (8,3)
(Other definitions for sleeping bag that I've seen before include "Camping equipment" , "Camping item" , "Camper's warmer" , "Camper's item" , "Something campers use - e.g. being pals (anag)" .)
(Other definitions for groundsheet that I've seen before include "something for campers" , "Waterproof base for tent" , "campers need it" , "protective cover" , "Camper's protection from damp" .)