Yep welcome from me and thumbs up for a great post too.
We all want different things from our sibbing but for our use we tend to avoid launch points that are filthy muddy towards low tide or set you off into a fast running estuary... we don't enjoy miles up muddy creeks with nowhere to stop off... we try and avoid difficult entrances to open sea that can be a hazard if the wind/tide conditions aren't favourable at the time of setting off or returning... and we like a few facilities at the launch/recovery point.
Which perhaps explains why we don't launch at Blakeney, Southwold or Aldeburgh.
For all our needs West Mersea provides the best launch conditions and area to head off sibbing with a choice of sheltered or more open waters.
I can't really add to my old thread here (post #16 on for my detail)..
https://www.rib.net/forum/f50/launch...sea-52571.html
I will PM you later re parking.