ctanner,
Well....... first of all you need a chainsaw. Then get some bar and chain oil, some gas and oil mix........ and...........

;D ;D
Sorry... couldn't resist.
Normally to get rid of autogen trees and such... you place an exclusion area on the troublesome spot. But with a default airport there ... I THINK that approach might also "exclude" the airport itself. Not sure. Then you'd have to find an add-on airport and place it over the exclusion.
I think this question might be best answered in the "Secnery and Panel Design" section.
best,
....................john

Intel i7 960 quad 3.2G LGA 1366, Asus P6X58D Premium, 750W Corsair, 6 gig 1600 DDR3, Spinpoint 1TB 720