Multiple pagename WP Query

For multiple slugs, you can use post_name__in:

new WP_Query( array(
  'post_name__in' => array( 'accommodation','activities','restaurant' ),
) );

For multiple post IDs, you can use post__in:

new WP_Query( array(
  'post__in' => array( 1, 2, 3 ),
) );

You can check the Codex for more details.