You might want to post a picture of the bed and the areas where you want to place the eye bolts. I would consider the eye bolts permanent and devise a system for quick release. If you are using chain, there are quick-release clamps. With ropes, you always can use emergency scissors. Just to get ideas, you might want to spend some time looking in an old hardware store, not a big-box store. You also can do a Google search for “eye bolts” and press images. Follow the trail of an image that intrigues you.