Derby's best two first-half chances fell to Giles Barnes, who almost reached Gary Teale's cross with Reina stranded.
Mr Teale said the security operation had to offer value for money, if the airport was to attract new airlines and routes.
Derby made a postive start after the break and Teale's beautifully weighted pass freed Kenny Miller, who was let down by his first touch.
Naysmith's fellow 27-year-old, Teale, has been rewarded for Wigan Athletic's fine first season in the Premiership with a call-up for the friendly against Switzerland.
BBC: SPORT | Football | Internationals | Smith withdraws from Scots squad
Scotland failed to take a grip after the interval, and McLeish elected to bring on Scott Brown for Teale in an attempt to freshen the midfield.
BBC: SPORT | Football | Internationals | Scotland 2-1 Georgia
Now that Teale has got the taste for international action, he knows that if he is to have a future with Scotland then he has to maintain his consistency.
Ayr though still could smell an upset and after 31 minutes Denham pulled down Reynolds inside the box and Teale converted the penalty kick to level the scores again.
Derby's pressure eventually told and their winner came after a superb counter-attack involving Teale, Pearson and Dickov, who pulled the ball back for Hulse to put the Rams in front.
The 27-year-old has had an excellent season at Wigan, with Paul Jewell's outsiders riding high in the Premiership and reaching the Carling Cup final, with Teale's role in their success bringing him into Smith's international plans.
But Gary Teale gave the home side hope with a low, raking shot which Maik Taylor - recalled for his first appearance since January - tipped round the post, although referee Lee Probert signalled a goal-kick.
BBC: SPORT | Football | Premier League | Derby 1-2 Birmingham
Things got worse for Derby six minutes later when Gary Teale stepped up to try to catch O'Shea offside but only succeeded in giving the Republic of Ireland defender time to pick his spot for his first goal this season.
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