Kam,
No need for Alderney ring I would say, but I will still have mine rigged I think but will not steam the anchor out in 6 ft of water this time
If the depth is 6ft I will steam over top of anchor and lift it out manually. If it is high water then will probably be around 30 ft at the same mark. ( That is what the tidal height difference is like ).
When you get to the slipway, walk to the end and take a look at the tidal height marker - awesome !
Been looking forward to the trip for weeks now.
PS: Metcheck said snow forecast for Sunday, which I thought was strange and then I realised that I was looking at Burnham ( somewhere in the extreme north ) as opposed to Burnham-On-Sea. Temperature forecast is much warmer at this one