Hi Darren
I would park my boat 2 boat widths' higher than him, and just in front and shadow him around the whole course, When he has a whinge which all monos do cry, Just tell him "thats that the safest place to have you", I think he will soon gets the Sh***ts, And i think the next time you meet he will probably more resonable
OR
The other option is
Tell him the boats insured to the hill and i need a new boat so i'm coming through
The last comment worked at or club where a guy used to try and bluff his way through grin grin