Thank you fafalone! Actually I discovered by accident that the terminal pieces can be placed on a slope, so I played around and just made "steps" and went from there. The corners can be a bit interesting since the pieces were never designed to be placed on a slope but with some time and trial and error alot could be possible using this method.
After lurking around here for several years on and off, thought I would post one of my airports. THe surrounding areas are yet to be completed but you will get the general idea. I realize the pic may be a little small for much detail, but if your interested I can post some closer images.