SWA has been offering r/t flights from IND to MCO for $82 which includes everything. Friends of mine are going Aug. 8-14 for that low price. They had a "ding" today for that price which was good up until Aug. 30. You might sign-up for the "ding" and see what comes-up for the future.
DW and I are going to WDW Nov. 29-Dec. 6 and made our reservations on NWA a few weeks ago. We paid $160 r/t and now the fare is well over $200. When SWA comes out for Dec. dates the fares may lower, but we like the idea of assigned seats to MCO. We do fly SWA and will be using them next month to Reno, NV, but that pre-boarding is minimal compared to half the plane pre-boarding for the MCO flights.