Hello, this link should help you, i know when I planted mine, I covered them with mulch for the winter
Point up about 6 inches down and 3 inches apart
Lilies like cool soil to root properly. So I recommend that you plant them in a pot and put it in your garage for the winter. If you plant it in warm soil, you will have weak plants. You can replant them in your yard in early Spring. After the first year they will rebound from the transplant and perform well. Good luck.