I'm going Cruising!

I've booked a 7 day Mexican Cruise!! I've never traveled to Mexico other than to Tijiuana so this should be fun. I'm not leaving for a few months yet but stay tuned for photos and a summary of our trip. I'll also post some info about how I found deals on the web. In the meantime I'm going to do some research on cruising with a 2 yr old. If anyone has cruised with a 2 yr old and has any tips please share. I'm wondering whether I need to bring a stroller? If so, should I buy an umbrella stroller? Do I need to bring along our carseat for the taxi ride between the airport and terminal? So much to think about! So come on all you traveling Momma's out there share your tips with me.