>>2802737You can go much lighter with a ultralight tent (1lbs). Tarp + hammock + suspension will always be heavier (2-3lbs). In autumn and spring you need a better even heavier tarp setup for the hammock while you can still use the same ultralight tent.
An underquilt is also heavier than a thermarest.
For a quick overnighter in summer you can take the hammock + thermarest, no tarp, like a bivi setup and watch the stars and it works above treeline as well. Its also easier for elk to have access to your face.