A Single will be fine, but double makes it easier to use a pad. I took the whoopies off my tablecloth hammock (my tablecloth hammock is 12' long, finished) and I use continuous loops. I found with the additional length of my hammock that I couldn't adjust it down far enough at times. It's become a lot easier by using the continuous loops. My mother is no longer using whoopies on her longer hammock either.