I carry an industrial kit and my brother has a mini paramedic triage kit that the rescue teams carry, you should always have one with you. Take some first-aid classes too so that you know what to do if something does happen, a CPR class is also a good one to have under your belt. Having a few trained people out there with you could make the difference in not only dressing a wound properly but it may save your life or one of your friends. Don't just stop with the first-aid kit.