I think it's best to come the day before too since you never know what can happen. This year our luggage couldn't be found right away along with a few others. The airlines didn't seem very concerned so we all had to insist to check the plane again. Mine was the last to come so it did delay us. The other couple's luggage wasn't there and they were leaving on a cruise that day. They were already running late for the ship and now they had to be delayed filling out the paperwork to try and find their luggage. I just was thankful they found ours but had they not the extra day arriving would have given me time to find it.
We ended up shopping and having dinner at Bayside which is always fun and woke up the next morning refreshed and ready to start our cruise.