Compton Abbas in the summer is such a friendly welcoming place it is so worth making the effort to find it! It can be tricky to find from the north east, but once you know where it is, it gets easier. Try and pick a day when the BBQ is fired up!
Or try Rochester, for a slightly amusing approach over the River Medway then the town! And then taking off over the motorway!! It is a great place for t&gs!
Of course if you are lucky, sometimes they open runway 21 R GRASS at Biggin Hill, tends to be around air show time! That was fun, quite a displaced threshold compared to 21 L Asphalt!!
Seriously if you have not done may grass landings, it is so worth getting an instructor and doing a tour of several places with grass runways. We did a great afternoon from Biggin to Earls Colne and Panshanger a few summers ago. Lunch at the golf club at Earls Colne, and tea at Panshanger. Such very different places, and a great experience.