Excellent idea, I'm up for it. Here are my experiences and recommendations of the suggested airfields...
Wickenby, Welshpool, Leicester, Halfpenny Green, Derby, Fenland, Norwich, Wellesbourne, Conington, Sandtoft
I didn't really rate Wickenby's runways or cafe. Perhaps too crowded for a meet and if the aeros box is open it can be hard work to stay out of the way.
Welshpool, I agree with the above that its too small wrt parking.
Leicester/HPG/Derby/Sandtoft: not visited these so would be interested on others views.
Fenland: two runways 36/18 and 26/08 so crosswinds shouldn't be an issue. Both are shortish grass (600m/640m respectively I think). Lovely food in the cafe too.
Norwich - again as previous posts: excessive landing fees and possibly too commercial for a GA meet(?).
Wellesbourne: Nice hard runways, lots of parking space, and a cafe with good food. Busy place with many aeroplanes and interesting pilots of all experiences and age ranges.
Conington: Pretty much as per Wellesbourne. Nice standard overhead join pattern (pictured in Pooleys), friendly service and nice cafe. Not sure of the parking space available. I parked on the apron and someone helped to push the aeroplane back into a snug spot; easy exit though!
Sherburn: all been said already, very nice strips with a spacious cafe!
GW
Edited to add:
Duxford: nice place. But quite a walk from apron to visitors centre for landing fee payment and restaurant.
Also, I can have 3 spare seats and am happy to pick up at places such as Cambridge (Ds3?) if anyone would like a lift/costshare?