Anyone use southwest points for air tran caribbean flights?

[jrw118]

I am contemplating using 76,800 southwest points to get 4 round trip tickets on AirTran to fly my family of 4 to either the Caribbean or Mexico next April. Does anyone have any experience with doing this? I am especially concerned with being able to find the flights I need since my dates are only slightly flexible within a few days. I have already checked and made sure that the dates are not on the blackout list. Are there any other concerns I should have? Thanks