Just be sure to check that other airlines with baggage fees are not cheaper. My brother goes to Orlando from time to time too (But not to Disney.

) and he is an avid, almost fanatical, Southwest proponent. He will
only use SW because he thinks they beat other airlines hands down. But several trips he has made have cost more with SW than going with maybe Delta and still paying the baggage fees. Granted, that is
not often but if it can happen to him it can happen to you. Just check with all of the airlines.
That being said I have always been reluctant to use SW because of the lack of seating assignments. I don't want to get to a full plane and find that their are a few seats left but they are scattered so my family will all have to sit separate. I know they have the Early Bird Check-in service but do you really think I can trust that?
What do you think?