I went with the full length and could not be happier. I left the ground because I have bad circulation in my knees and feet so I did not want to let them get cold in a hammock either. The weight is worth it and really not that much when you figure you still need a small pad of some sort for your legs. I believe my HG incubator weighs 24.5 oz without the stuff sack.
Solution!!!! Sleep in a TREE