I lean more toward ultra-compact, than ultra-light, but they go hand-in-hand. My tools/tube/pump/lock are permenantly stored in the bike's frame tubes/nooks/crannies so I consider that bike weight (which is certainly heavier) but my single front pannier is ~6kg/20L before adding food/water, and maxes out at ~9kg/30L with water and a 1-2days food, except for when wild camping and I haul an extra 2L water bladder on the rear rack for the last bit of ride.
Need not sacrifice that much in comfort - double-wall tent with sit-upright room, daily shower (incl wild camping), proper air mattress/pillow, down quilt, half chair, stove, water purification, 2 extra 'outfits', and camp sandals...