Living in the area 2 alternative sites come to mind.
The Kent County showground at Detling
Just a suggestion!!
I'm not sure Detling would work as i believe it's a holding stack / flightpath for Gatwick -
http://ivao.co.uk/atc/ltcc/se . ATC's not my thing so i may be wrong, I drive past it everyday ( or sit in traffic on the hill ) on the way to work and the thought of yet another trip, even once a year would be very depressing
How about Brands Hatch -easy access when there's no racing on .
West Malling would have been good except it's now a housing estate and golf club.
Groombridge Place has a fair bit of room (have to keep the birds of prey indoors though).
Hever Castle - now that would be very handy for me
There was an old airfield at Penshurst - not sure what happened to that.
But at the end of the day it was working very well at the Hope Farm, let's hope this is just a one off and some lessons are learnt from it.
HawkEye