Many posters here try priceline (airport area) for one nighte and have good success getting a good hotel for little $.
Also, I have heard positive reviews of the Hilton Garden Inn, The Hilton onsite at the aiport, Renaissance near the airport, Hawthorn suites near the airport I believe all of these offsite hotels also have shuttles.
There may be info on the Orlando airport webite. Sorry, don't have link handy, but you could do a search.
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