I agree with those who have warned about having film developed at an "outlab"...
I worked in one many years ago and wouldn't trust them with valuable photos. If you would see how easy it is to lose film and negatives, you would agree. Now, granted, all places may not be the same and things may have changed, but are your Disney pics worth the risk??
As for York, I once sent them a roll of film for developing and they completely ruined my negatives. And when you use a "by mail" company, it is harder to complain when things go wrong!! When this happened, I couldn't find a phone number to call and complain and writing letters got me NOWHERE!
I agree that the safest place to have photos developed is anywhere that your film, negatives, and photos will stay "in house". I now use Ritz for important photos and for me, it is worth the extra $.
As for the x-ray machines at the airport, I have never had anything happen to mine either and I just put my whole camera bag (incl film) in the belt.