Jon, thank you for your input. We did pursue buying a tux from a local source, plus renting from a formalwear shop. As luck would have it, on another travel board, a travel agent responded to my question. She took 18 people on a QM2 trip the middle of June and assured me that a tux was NOT necessary, that a darkj suit would suffice. Also, she said that during the day, casual wear was the norm, that most people wore work-out clothing. This is a relief for us, as we do not want to lug along a tux with all the rest of the attire. But thanks for the info!