Re: Marina on the Jersey side of the Delaware
Have a look at Salem, I have not been their but is may be an option.
A bit further way would be Hancock Harbor on the Cohansey below Salem and about 25nm from the C&D. Nice marina with a lot of sail boats.
But if you are driving from North NJ, Delaware City is not far from the Delaware Memorial Bridge and may be a shorter drive than Salem or the Cohansey, or anther 30 to 40 mins will get you to the Bohemia or Sassafras on the Chesapeake, as opposed to 2 to 4 hours motoring through the C&D.
1970 Havsfidra 20 by Fisksatra
On the Delaware River at Fox Grove Marina Essington PA