Ok you will be about 30-45 minutes (depending on traffic) north of the Convention Center in MiamiBeach. If you have been to Miami before and are somewhat comfortable getting yourself around, then rent a car at the airport and go to the convention center. I would recommend staying to sleep in Lauderdale maybe somewhere on the beach that way you'll be closer to the airport in the morning and it'll be easier to find a room. If you want more detailed info. let me know and I'll give you my number.