I use Tree Huggers from the Whoopie Sling site and they are really easy to pull out I think because they are so soft. But last weekend I used my cam straps from my car (which are very stiff and new) that I tie on boats with and they were really difficult to yank out! The material that the straps are made of makes a certainly difference.
Love many, trust few & always paddle your own canoe. American Proverb