To say there's not a person in the suit pictured in Chronicles is a very odd comment and a couple people made it. It's quite obvious there's a person in it and I don't see how it can be perceived as empty or why someone would think they would shoot an empty costume.
Chronicles is a mix of image sources pre, during, and post production.
For example: Short haired Han - post production (Force 10 from Navarone/ Holiday Special haircut).
Chewie's hair looks a little matted or thin. Maybe they just brushed him out later.
He is very tall and lanky though it's harder to tell with his arms down.
Other ANH era examples:
http://aptirrelevance.com/sw-archive/imgview.php?id=01054
http://www.hec.unil.ch/cei/pics/chewbacca.jpg
http://photos.imageevent.com/iamkatia/face...d/chewbacca.jpg
ESB:
http://images.wikia.com/es.starwars/images/5/56/Chewie1.jpg
Here's Mayhew bulked out for ROTS with a musclesuit underneath:
http://starwarssaga.punt.nl/upload/zz015.jpg
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