Flew out of here for a Disney trip in Orlando and couldn't pass up the $90 flight (one-way) into the Orlando - Sanford Airport (about an hour away from Orlando). There was about one Allegiant flight per day and the flight wasn't exactly full either.
The main airport building is tiny... in comparison to Charlotte-Douglas. And the Allegiant side is undergoing renovations, but currently it's in an airplane hanger (with one gate). Once you get past TSA security (yes same rules apply), there's a large waiting area but the bathrooms are the portable kind... it's one step up from porta-johns, but they were put there as an after-thought... and you have to brave the elements to get to the single person trailer stall.
Parking is free and there are over-flow lots, but something tells me that they don't use overflow too much. Probably as the airport grows, it will become more popular.
The comical part of what I observed was that the music in the entire retro-fitted hanger was provided via boom box.... located on a vendor table with pamphlets about the City of Concord. There were a couple of times the TSA agents went over to adjust the volume, but it was just funny... felt like the airports version of a personal house party.
Foodwise: you better bring your own stuff to snack on... otherwise you are at the mercy of 3 vending machines and a self-serve Starbucks station. All the machines take cards.