It’s almost midnight and still bright outside. I’m in Iceland during the summer solstice, when the sun never really sets. I’ve packed all the camera equipment I need for an overnight trek through amazing scenery, along with food, water, extra clothes, and other miscellaneous gear. How much does my fully loaded bag weigh? Eight kilos (eighteen pounds). This might not seem very lightweight, but, for a photography-centered expedition, it isn’t bad at all. So, how does that look in practice?