Oh dear, well Hubby and I are totally informal, but i don't worry too much about fitting in -- i think as long as we're clean and pressed without patches on our clothes we'll pass for "civilized"
But i AM looking forward to the formal evening dinners! It's a chance to dress up and feel elegant. Hubby's allergic to tuxedos

but since this is a really special occasion for us he's being very accomodating.
This next week i'm going to start shopping for evening wear, and intend first to go to places like Goodwill and other used clothing shops. I'm also going to sew at least one fancy dress myself, as i love to sew costumes, and basically disguising myself as an elegant lady on a cruise sounds like a fun costume