No matter how hard you try, at some point or another you will end up sustaining some kind of injury on a party bus at this current point in time. There are a lot of precautions that you can take that can help create a situation in which injuries would most definitely become a lot less likely without a shadow of a doubt, but eventually all of your precautions would become useless and the only thing that you can do would be to deal with the situation if and when it arises and needs to be reckoned with.
Perhaps the most common type of injury that you might sustain on a party bus Charleston SC would be some kind of a cut, and as a result of the fact that this is the case your most important tool that you should add to any first aid kit that you are bringing onto said party bus would be a set of bandages. These can be wrapped around the cut thereby stemming the flow of blood and allowing the wound to cauterize so that the bleeding no longer continues to be the sort of thing that you need to worry about all that much.
There are a lot of other tools that you need to add to your party bus first aid kit too of course, but suffice it to say that if you just bring bandages on board they would help with the vast majority of injury related problems that you would need to figure out a solution for. Hence, if there is only one thing that you bring with you for first aid, it should be a set of really clean bandages.