Twizel is a small service town that works best as a base for Aoraki/Mt Cook, lake and canal fishing, and scenic drives, so treat it as a practical stop rather than a destination in itself. You will find a supermarket, a couple of fuel stations, ATMs and a range of accommodation, but options shrink outside peak season so book ahead. Weather is alpine: days can be sunny and cold, nights are noticeably chilly and roads can ice or be windy in shoulder seasons, so bring warm layers and sun protection. Cell coverage is generally fine in town but patchy on remote routes, so fill your tank and check road conditions before heading into the backcountry, and consider booking guided fishing, boat or glacier trips rather than trying to organise them at the last minute.