Buy a decent prosumer or professional 1080 3CCD HDV camcorder, used of course. This will be good enough for your work.
Shoot a little 'wider', meaning keeping room on all four sides for the video to move around. In post production, you will need a professional 3D Motion tracker software like the one in Nuke or Boujou, Syntheyes, etc. These are expensive, but they work miracles on most of what you are capable of shooting. AE has a 2D tracker (last I used it), which is not reliable for bad shakes like the ones you get in aerial photography. Hope this helps.