A prior poster made a comment about carrying on your mini's and living without clothes for the weekend. I 100% agree with that mentality. Its a really easy justification.
Clothes for the week are less expensive then replacing my army, and less agrevated then rebuying or repainting my army.
My initial plan for going to Adepticon was to fly, life circumstances intervened and I cannot go. My plan was to pack my warmachine models in the Army transport platoon, I can fit my 50 pt list. Then put the books on the bottom, and dice would just be put into the bottom as well with template / tapemeasure, no dice try etc, and just bring a dice back. Then carry it on.
My total clothes for the weekend: 1 pair jeans, undergarmets, 1 hoody, 3 t-shirts, shower stuff in a book bag. That's it. Forget about shaving for the weekend, bring the basics buy whatever else you need because it will be cheaper then replacing your Battlefoam and your army.
Games will understand. Plus have the time, you'll probably still have better hygiene then 75% of the guys there as long as you showered, brushed your teeth, and managed to now spill a brew on your hoody during that late night outing the night before