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There is a much better chance of avoiding permanent damage or even death if the injury can be treated quickly. RV Ops have first aid kits that can help to deal with most minor and some major injuries. Sometimes it can be something so seemingly minor as a wasp sting that can lead to a serious problem later on so take your travel first aid kit and deal with the problem before it becomes a major issue.
If an injury is obviously more serious, then you may find a use for a Haemorrhage Control Bandage or maybe the Celox applicator. The applicator is designed for dealing with Shrapnel injuries and related wounds that cause serious blood loss but are difficult to treat on the scene. Sealing the wound will stop the loss of blood and allow the injured person to survive until more advanced medical help can be reached.
If the injured person cannot walk unaided then you will want to make sure that you have the Poc-kit stretcher as a part of your kit. This stretcher can be assembled in seconds and makes it easy to evacuate the injured to a place of safety where they can be more effectively treated.
Wherever you travel, first aid kits are an essential part of your kit than can potentially make the difference between life and death in many situations. If the size and weight of the kit is a particular concern then why not take advantage of the Ultra light Watertight Medical Kit that RV Ops have in stock. This travel first aid kit has been specially designed to be light and easy to carry. It is also waterproof so it is well protected from the elements and yet complete enough to provide adequate help in the event of most common emergencies.