The temperatures in Arnhem Land are always warm, even during the wet season, so always packing a reusable water bottle and having it with you is a good idea. You should also pack some comfortable and sturdy hiking/walking boots as there are several different landscapes throughout Arnhem Land, including thick bushland, rainforests, coastlines, and wetlands. Pack sunscreen to protect you from the sun's UV rays, a first-aid kit, a few snacks to recharge on your adventures during the day, and plenty of weather-appropriate clothes would be best.