My cruise is getting closer and I keep thinking of one more thing I don't want in my checked bags! So, I know I have to keep day bags with me until my cabin is ready, but that's no biggie to me. I travel for work all the time with my roll aboard and a carry on/personal item. So, can I do that here, too? Like a back pack and a rolling carry on per person? As long as I keep the sizes right? Just double checking! Thanks!