If you have access to a time machine, travel back a month and make your reservations then, like I did.
I don't believe in jinxes, but if I did, I would think making non-cancellable reservations is about as jinxy as it gets. Change fees are garbage, so stick to Southwest or plan on driving. You might consider flying in/out of Orlando instead of Ft. Lauderdale? Not sure if there's a significant cost savings or not, what with the Disney travel over winter break.
Don't forget car rental if you fly. That, at least, appears to be really cheap.
For lodging, I don't think you'll find any beachside resorts that don't charge at least a 1 night cancellation fee. You might consider booking something now at a cheaper establishment off the beach that is fully cancellable, just as a place holder, and then keep hunting as teams like Alabama, ND, etc. drop out of contention.
The alumni travel packages are $$$.