I have to keep my packing to a minimum - flying hand luggage only - for a week. I'll eat in the buffet on formal night(s) so won't need clothes for that. It's ages since I last went on MSC and things have probably changed, but as shoes take up the most space I'm hoping I'll be OK in my pretty trainers so I can use those daytime and evening, too. Would I be OK with these, with tidy trousers and top?