The Paddock Hill Grandstand won't be open for the event.
Stage diagrams are at
http://brandshatchstages.co.uk/sites...ams_v1_msa.pdf
Between junctions 3 and 4 (at the gate) there's a bit of a jump, the closest access is the bank at Paddock but I can't recall what the fence etc is like there.
Otherwise the rally school stage is normally slippery as another option.