I've been section hiking the Long Trail in Vermont this year and one thing it's taught me is that you need to let go of your desire to control everything on a backpacking trip. In fact it's therapeutic. So, even when it's raining dogs and cats, I get up in the morning, put on my rain gear and keep on hiking. As long as you manage your layers properly, it's not such a big deal. Oh, did I mention that it rains on the Long Trail almost constantly?