I use my shorter wraps for simple ruck sack Cheshire, but you don't have to. You'd need the longer one for the double hammock I think.

The ruck sack is easier to do but the double hammock was more reassuring for me when I started back carrying. There's other back carry variations that might work for you too (YouTube and Google can show you plenty). Once I'd mastered the double hammock I got more proficient at ruck sack.