I have never understood the problem with dress codes, the details are in the brochure/website, not reading them is no reason not to comply. To adhere to published dress codes is just normal good manners. The luggage thing is another one, everyone is "in the same boat" so to speak so we all have the same limitations on what we take, wearing the same outfit more than once is expected. If your clothes are uncomfortable blame the clothes, not the dress code.