> If its for outdoors, it actually becomes a problem because the hammock is longer than most tarps.

yeah but … and 11 ft. tarp requires a distance of at least 11 ft. while 12 ft hammock hung with a sag of 83% to 86% requires a distance of around 10 ft.

The 12 ft hammock will definitely fit under an 11 ft. tarp. - not a lot to spare; but under is under.