I suggest you "take a nibble before you take a bite." Instead of departing to sea from harbor "X", make a coastal day sail to harbor "Y" and depart from there. This gives you a chance to exercise all systems to be sure they are working and you have not forgotten anything.
For example on our annual migration North to New England
we depart from Fort Pierce, Florida
and sail and motor
to St. Augustine which is about 30 or 36 hours North. If there is something that we find needs fixing, adjusting or needs to be purchased we can lay-over there a day or two before starting the "big hop" of 435 miles to Cape Fear, North Carolina
We will always have found something we have forgotten or needs to be replaced: Double "A" batteries, new spark plug
for the dinghy motor
, extra propane tanks
for the rail mounted grill
, spare thermostat for the engine
, once a new mizzen halyard
'cause the old one was frayed. With the hundreds of individual elements that make up a cruising sailboat I'm never surprised that something is worn out or forgotten. St. Augustine is, in any case, an excellent harbor for cruisers with lots of marine
related shops and facilities. The same can be said for any harbor on the east coast
with a class "A" inlet.
The point is: take a "shake-down" cruise
to a harbor with a lots of marine
services before you make your big hop.
My two cents.