The best all-in-one superzoom travel camera for capturing high-quality photos and videos on the go, considering factors such as portability, image stabilization, and wide-angle zoom capabilities, is the Panasonic Lumix DMCFZ300. It offers a powerful 24-200mm lens, 5-axis image stabilization, and 4K video recording. It also has a touchscreen LCD and a variety of advanced features, making it a great choice for both beginners and experienced photographers. Additionally, it is compact and lightweight, making it easy to carry around while traveling.