CC Club Site Baltic Wharf Always full

Does anyone else have the same problem trying to book this CC Club site.  Last year we booked theatre at Bristol and then tried to book the site - it wasnt a bank holiday not even a summer weekend but the site was full.  Last autumn we booked to see a show in Bristol on March 29th 2013 we couldnt book Baltic Wharf because bookings arnt taken til 6th Dec.  On 7th Dec (being unable to book on 6th) we find all pitches booked already!!!! I know its Easter Fri but ONE DAY later. Frustrating to say the least and now we are left with trying to find parking for a 8 metre motorhome in the centre of bristol to see the show and then drive somewhere else to no doubt stay in late arrivals til the next morning.  I have now checked this sites calender and every weekend in 2013 is booked! Is this because the site is open to non members and if so shouldnt being a member entitle us to some priority?  When asked the Club and the site both advise "just keep ringing and asking for a cancellation" so I guess we are left with hopin the van and the dog are still there when we come out of the Theatre!  A long rant I know but it is just SOOOOO frustrating. You cant leave the theatre booking till the club bookings open or you wont get a seat and then you find you cant stay in Bristol five months before the event.  Anyone else suffering this problem?