Apples are a blessing of the harvest. Put the apple in the tub, float it in the water. Grab the apple with your teeth be just like an otter. Bobbing for apples is an age old tool for communicating with the other side.
Water represents that veil that is so thin at that time.
Apples have always been associated with Goddess and temptation. At your Samhain gathering, have a big bucket or cauldron, some room temperature water, and a number of largish apples. Before you begin, you need to have a question. Pick something that is happening for you at that moment that you relate with renewal - perhaps some part of your life that is over, or another area where you need to sow some new seeds. Then bob for apples as usual.