South - Moving to BTR-which FFP?

Hello,

Well the family is moving again. I will probably fly mostly out of BTR for work. We will fly out of BTR and MSY for leisure. Which frequent flyer program should I concentrate on? Leisurely we fly to IND and RSW regularly. I have never flown Southwest and know little about it. Thanks in advance.

I believe DL has the most frequency to BTR and they're also quite big out of MSY where they even have a Skyclub. Plus, I think they're actually quite good in coach.

Thanks. I was thinking DL and that is what I predominately fly out of AGS currently.