Longlocks11

Myself and 3 other friends are about to book a cruise for the Caribbean. We are late 50's early 60's women. It seems to be much cheaper if we all stay in one room which is nice so we can all talk and plan our next day. I'm just wondering how crowded it will be? If I remember right the upper bunks aren't the most comfy. Roominess is the big issue. We do pack light. I bag each. Carnival cruise line is who we are going on. Any thoughts?