The essential equipment for a successful island peak climbing expedition includes:
1. Technical climbing equipment such as a harness, helmet, carabiners, slings, ascenders, descenders, ice axe, crampons, snow pickets, and anchor building materials.
2. Mountaineering boots, insulated sleeping bag, down sleeping bag, sleeping pad, headlamp, and lightweight tent.
3. Clothing: waterproof and breathable jacket and pants, insulated jacket, light and warm layers, fleece and synthetic base layers, gloves, and hat.
4. Personal items such as a first aid kit, sunscreen, lip balm, sunglasses, water bottles, energy snacks, and a camera.