回复：a few suggestions ...

thank you so much for your suggestions, i think maybe i should be avarious to ask two more questions^-^

1.worthwhile to go to Fort Lauderdale? i have heard the beach is similar to Miami...

2.is it worthwhile to go to Dry Tortugas island? the ferry fee is 115 dollars, and camping is inconvenient without water...(but some friends told me that it is recommended..., i am confused)

Anyway, the basic plan would be :
Orlando for 3 days
Miami for 1 day
key West for 1 day
Only 5 days, seems too short...