Being a diabetic, i have shit loads of stuff to carry around with me wherever i go such as blood testing kits, needles, insulin, glucose tablets, cereal bars.
I am the same as you mate. I wear a big jacket with really deep pockets, as I hate carrying things. It is abit annoying if I am meeting my mates in town and am going out for the evening. Most of the time I am going to be staying the night at one of their houses, so usually carry my insulin with me. In one pocket it is my Humalog and the other it is my night time Humulin. I find a jacket is the best way to do this.