As far as airfields go it would seem to be between
Headcorn and
Rochester.
As a first step I would visit both airfields and checkout the various clubs / schools. It's better if you pop in at the same time of week as you think you will be flying - many airfields are completely different places during the week when compared to the weekends. Do remember that if you visit on a wet and rainy winter day then any airfield is not going to have a lot going on.
If you are around Headcorn then make sure you pop into the
Tiger Club.
OC619