Before leaving for Laos, pack clothing adapted to your trip. You will mainly need light clothing—preferably long—to protect yourself from mosquito bites and sunburn; waterproof clothing; and warmer clothes for evenings, as temperatures can drop quickly at night during the dry season.
Don’t forget sunglasses, sunscreen, and a hat: you will need them every day.
Also pack a swimsuit and a towel, as you will be able to swim in the many rivers of the country.
Prepare a medical kit with your medications, a water purifier, mosquito repellent, and treatments for stomach issues.
Bring your camera and a spare battery, as it won’t always be possible to recharge it.