Is wrapping only possible for package bodies?
PL/SQL Source Text Wrapping


  You can wrap the PL/SQL source text for any of these stored PL/SQL
  units, thereby preventing anyone from displaying that text with the
  static data dictionary views *_SOURCE:
  
  
  Package specification
  Package body
  Type specification
  Type body
  Function
  Procedure
  


A script containing a CREATE TABLE statement does not fall into any of the above categories.

Also, keep in mind, unwrapping such source takes seconds (for example: http://www.codecrete.net/unwrapit/). Oracle generously classified this method as low-assurance security (see above URL), but I would rather classify this as non-existent security.