Open All Year Site Near Southampton

Hello Everyone! This is my first visit to this part of the site and I need some help! We have grandchildren in Southampton whilst we live in Wales! During the 'season' we stay at Rookesbury Park or Winchester Club sites but when these close for the Winter, we are left with Sandy Balls near Fordingbridge which is a bit too far away. Can anyone point me in the direction of a good commercial site within say 20 miles of Soton, or even a CL, preferably with hardstandings as we caravan all year round. Thanks in anticipation!