Can you arrive earlier than check-in time on a Carnival cruise?

So, you're wondering about showing up early for your Carnival cruise, huh? I've been there, done that, thought I could beat the system. Wishful thinking! Carnival really doesn't want you there before your assigned check-in time. You know how when you do that online check-in thing, you pick a time slot? Yeah, they actually mean it. They practically beg you to stick to it. Why? Well, think about it... hundreds, maybe thousands of people all trying to board this giant floating city. Organized chaos, right? They try to stagger everyone so it's not a complete free-for-all. I remember that one time in Miami, we tried to get there super early, thinking we'd be first in line and sipping margaritas by noon. Nope. We ended up sitting in the parking garage for, like, an hour! It was hot, the kids were grumpy... What's the point, you know? It actually slows things down if everyone shows up early. They've got a system, albeit sometimes a little clunky, but a system nonetheless. So, short answer? Don't bother trying to arrive early. It just won't work. Trust me on this one.