We used to do that for every trip. But, it was not me invading his packing space, but the other way around. And, always at the last minute. Used to make me nuts when he would decide he had to take his boom box (now archaic), PC, a hand drum, etc ., etc., etc. the night before we were leaving. To minimize pre-cruise tension, we finally agreed to pack separately. I like to plan in advance, he likes last minute. This way we both are happy. I would rather lose my suitcase. I mean, what's the worst that could happen? I have to go shopping?!?