The only marriotts that have rooms like that are part of the vacation club or residence inns, so limit your search to those.

There are about eight vacation clubs in Orlando and about 13 total in Florida. See here for the vacation clubs: http://marriott-vacations.com/travel/resorts.html.

You can also search on the website for just residence inns which have 2 bedroom suites.

Which starwoods have rooms like that?