There are numerous ways to organize you supplies:

You can crate “kits” based upon injury type, such as a burn kit, laceration/cut/scrape kit, immobilization kit, major trauma kit etc. You can still have a master kit with a variety of supplies to supplement and restock the “kits”.

Advantages: This system can save time in an emergency, in that all the necessary supplies are specific for that type of situation. Others can look inside the master pack and grab the appropriate “kit”. If you have a first aid station and an injury occurs at a campsite, if you know what has happened you can grab the appropriate “kit” take it to the scene and still have a functional first aid station.

Disadvantages: Requires a fair amount preplanning and organization. You will end up with duplicate items in different “kits’ as well as the additional cost.

Master kit, will have a broad spectrum of supplies organized by supply type, i.e. bandages, dressings, wound care, medicines, etc.

Advantages: Easy to organize, little redundancy, set up correctly can be easy to use. Many commercial kits are set up like this, so tracking expatriation dates and restocking is a little easier.

Disadvantages: If you have an emergency, may become flustered looking for needed supplies and may be harder for others to find supplies. Must bring entire kit, if treating at scene and the First Aid Station out of commission.

Master kit with smaller “on-scene kits”: Same as above, with the advantage of keeping your First Aid Station in-service.

Other options:

Master kit with each individual/patrol having a smaller personal/patrol kit that is carried at all times.