Kandi,
Call them up on 130.8 and join as you would at any airfield. Stick to the taxy ways and follow the marshallers if they are out.
Then wallow in the nostalgia of a last chance to visit a 99 year old airfield where Rolls-Royce tested the vertical take off rig, first flew the P51 with the Merlin, Von Werra tried to steal an aircraft to escape to Germany and much other aviation history was enacted.
I'm sure you will have a very warm welcome and I wish I could be there to join you.