Re: North from Charleston
Air draft has not been a problem with our E42. Depths can be an issue as there is a lot of shoaling.
Cruisersnet.net has good up to date reports from reliable sources.
We always try to do the straight run from Charleston to Beaufort.
The next area that poses issues is running down Delaware bay. Northbound you cannot beat the tide no matter your timing. And you will have to go outside at Cape May. Often you have winds blowing in from the east making it a nasty ride. If that happens consider ducking in at Cape Henlopen and then crossing the mouth of the bay the next day. The NJ coast is not great either.
Good luck. Send pm if I can help with the trip or with the E42