You're right about Pan Am and Air 2000 being the only airlines. The airport is TINY! It is much nicer since they rennovated last year. The first time we took Pan Am into Sanford, we had to walk from the tarmac to the airport, and the baggage claim was out in front of the airport on the CURB!!! The airport is easy to maneuver, and you don't have to worry about lost baggage or air traffic control.... one plane at a time... only a few planes a day, it's hard to screw things up at such a tiny airport. Pan Am is a TERRIBLE airline, though. I don't suggest you use them.
The ride to Sanford and back from WDW is an easy one. We have never encountered any major traffic, even in the morning.
Holly