Here in Coastal NC we call tourists at the beach "tourons" - a contraction of "tourist" and "morons", which usually describes them pretty well...act like they own the place all the time.
Cute

Shoobie comes from a cloudy legend which includes a few possiblities:
A) In the old days, tourists coming by rail brought their lunch and clothes in a shoebox.
B) In the old days tourists often left their shoes on even on the beach.
C) Tourists can't handle walking through the hot sand and they wear socks or shoes which gives them a tan line so that when they finally do take their socks off, they still look like they are wearing shoes.
In North Jersey, the appropriate pejorative is "Benny" which also has a cloudy origin but it's most likely a slur on the nationality of most tourists from NYC, or an acronym for "Ban all Elizabeth, Newark and NY," referring to the glut of tourists from those areas going from around Avon on up through Sandy Hook.