I believe it was supposed to be a VW Van, hippy/love-in style.
Actually I just discovered I made a mistake, Shaggy's last name is Rogers :P I just assumed that Scooby used the same last name as his owner.
AUTHORITIES SAY THE 230,000 ACRE FOREST FIRE ORIGINATED FROM THIS VAN. THE LICENSE PLATE WAS TRACED TO SHAGGY DUE, WHO WAS REPORTED MISSING A DAY AFTER THE FIRE BROKE OUT. INSIDE, INVESTIGATORS FOUND THE CHARRED REMAINS OF A MAN, A DOG WITH A TAG NAMED SCOOBY, AND WHAT APPEARS TO BE A MOBILE METH LAB. THE INVESTIGATION IS ONGOING AT THIS TIME.