Dont know about the porthole/picture window thing, but if you go to Carnival's site and log in with your booking number, you can click on "my stateroom" and it will give you the catagories that you may be in if you booked a guarentee.
I would imagine that less kids would be on since they are in school (or very close to going back to school). I think the time for kids is summer and spring break and probably earlier in winter break, but I am sure there will be more than if you cruise in say September or October since they just went back to school.
Victory, here I come!! - October 2, 2004