I think this is an expensive lesson for you. If you aren't familiar with an airport, ALWAYS call ahead, even a day or so in advance never hurts. Get their hours of ops etc... Another quick and easy source is AirNav It'll get you FBO's, phone numbers, fuel prices, and user comments.

When I flew 135 freight, you never knew where you were going, or who you'd need to be there, so I always took an extra minute or two to find a number and call. Never assume!!!