Get plenty of rope, and maybe in two or three long pieces. Then we can tie it down several times and give it some extra stability.
Suzi's right...I may need to fuse the ends with a lighter or some such. You know, come to think of it, the rope my brother's used for building various things in scouting was probably just the sort of rope I need. It was nylon, I think. Not super heavy, but strong and easy to work with. They used to have bits of it all over the house for practicing knots.