Everyone invited. People in Essex, come over QE bridge, left down A2.
Pass Gravesend and keep left A289 (posted Medway Tunnel).
First roundabout keep left A228 posted (amongst other things) Thamesport.
Follow A228 for 7 miles.
Turn left into Lower Stoke High Street.
At end, look diagonally left and you will see the Ship.

Alternatively, take a big, big run-up and jump like hell across the Thames, or the Tilbury Ferry to Gravesend, steal a car or motorbike (don't worry, everyone does it there), A226 east, A289, A228 and as before.

If you have a microlight aircraft, fly into Middle Stoke airfield.