Imho I think you will need a gangplank for the side door , also for lounging on top you must have a railing of 'take down' construction while transporting . so you can poise pirate style at the railing . maybe a 'plank' for walking extended off one side .
A couple big lanterns haning off her stern and one for the inside too . and a water line stripe that gives a sweep to her .
The ports look good to me .
Of course you'll need a flag ....
I'd make it a frendly looking pirate flag as a some 70's 'chevy van ' with a bad looking flag campin out at the lake might scare some mothers
proly remind her of the 'chevy van 70's' ,yea that would do it !!!!
you could put a lapstrake type wood hull shape add some painted 'blue seas' painted under the hull , expanding foar for a three d effect ?.......maybe hint of a rudder off the stern . a pirate style ladder for getting up and down .
You don't have a elvis on velvet in there do you ?
dogs playing poker
Big canopy off one side of the van with pirate colors of your choice ,black with a huge skull and bones .....comes to mind . Oh yea and tiki torches ....
Illusion thats all . with a good ol' Aaaaghaa ever now and agian ,
Good luck with it
Gary