You want to fly in on a GLEX? EDFE probably to small for that...
If you go to Hahn, be aware of the fact that it is in the woods...
There is a route planner on Hahn Airport homepage:
http://www.hahn-airport.de/default.a...u=by_car&cc=en They do have a dedicated GAT, but its not shiny one. (but I havent been there for 3 years so maybe it changed)
http://www.hahn-airport.de/default.aspx?menu=gat&cc=en
Usually it shouldn´t be a prob to park 3 days in EDDF, but getting the slots might be tricky...