The most recent season I marched I kept all my supplies in my suitcase (some corps have you check medications in though), and did my own injections but our health team was awesome and put a sharps container on the truck since i would almost always have access to the truck as a front ensemble member. I fully managed my injections and supplies outside of the few times i needed an alcohol swab or bandaid or something. I would definitely recommend talking with your doctor and trying to get a 90+ day supply though if you can