The best capacity for your needs depends on how many people will be using the tent and what you plan to use it for. If you are planning a solo trip, you will need a smaller capacity. If you are planning a family trip, you will need a larger capacity. When choosing a capacity, it is also important to consider the size and weight. A smaller capacity will be easier to carry, but it may not be large enough for all your gear. Conversely, a larger capacity will be heavier and more difficult to carry, but it will provide more space for you and your gear.