Whenever I go with my studio to performance venues (my studio doesn't compete, but we perform at various events 2-3 times a month), our company waltzes in carrying about 50 duffels, backpacks, garment bags, and makeup cases. For the most part, my teachers have not bothered to organize this chaos; they focus on the performance itself, rather than the preparation. A couple weeks ago, I saw this picture on Pinterest.
When I was little, my mom used to buy antiques from a local junk store, and for whatever reason, an old Samsonite suitcase was one of the few things from that store that we still have around.
The first thing I did was measure and sew the ribbon. I had to be long enough to not only span one side of the suitcase, but to hold a rather bulky object as well.
Because the two pieces of ribbon joined together, individually they didn't have to be quite as long. I used a regular stapler to attach the ribbon to the suitcase lining, but one of the straps came off while I was packing everything up after the performance, so I will update you on what I figure out. I had my dad help me get the mirror even, we but Velcro all on the edges of the mirror(with the other side attached) and stuck it to the suitcase. It is very strong, and has held up very well.
For the tackle box, I wrote my name on the outside in permanent marker, and organized my hair stuff inside it.