Brewer yard in Port Wash./Manhasset bay good but if you
don't need to be in a yard, there are town moorings in Manhasset bay (yellow moorings)that you can pick up free for 48 hours or anchor within minutes of all the yards and the town/town dock.
I am local to Manhasset bay and can contact friend(marina foreman)
and see if can get qualified tech to come to boat if you want.
Also if any transportation or reprovisioning info needed, will be happy to help.
Will be sailing out of Manhasset bay tomorrow.
Thanks for all the great support but MainSail did remotely what three yards had failed to do hands-on and find the actual problem. We are in good shape now so it's overnight in Port Washington the through The East River tomorrow - very exiting!