10 mile hike in a volcano?

I hiked at a place similar to this in Hawaii a few summers ago. I would recommend dressing in layers, bring something in case it rains (like a raincoat). Bring lots of water. WEAR STURDY SHOES AND SOCKS. Bring a salty snack too, like pretzels, it helps your body use all the water you'll be drinking. A small first aid kit might be good, just in case. Bring your cell, fully charged, and use the bathroom before.