When I referred to Mithras, I was including the use of Cockcroft. If it is not available then P&R will be a mare. My understanding was that there was a mess up between the club and university for the Forest game so Cockcroft closure was a one off. If it wasn't then going to have to re-think...
Mill Road is easiest if going down the A23, but is also the first one to fill up. I've always found the others a pain in the backside getting to from A23/A27, so always use Mithras House via Ditchling Beacon. Leave Haywards Heath 1:30, at Mithras by 2, climbing the mountain that is WSU steps...