Those designs are awesome and you should get some real attention from the CMs. We have done t-shirts in the past - they were white shirts with Disney script that said "Disney Nerds". The CMs went crazy and kept asking us where they could buy them. This year our entire family (11 of us) are going in early December and we have red polo shirts that my sister used her embroidery machine to put Mickey & Minnie making a snowman on. I'll post a picture of us when we return. I think matching shirts are such a fun idea.
Lisa