I already have a fiberglass coffin-style sailbox on my trailer but it would be very easy to build one using plywood and then rolling on a waterproof barrier with something like Monstaliner http://www.monstaliner.com/
Recommend using the "Search" function to find discussions on homemade beach wheels. It's a common topic.
Regarding Boat Names, how about Usain Boat
(Haha I'm envisioning hull decals of his famous pose).....
'82 Hobie 18 SE with '85 Nationals Prism (White) sails
'73 Laser HID# 3463