Capers is very dependent on down and distance when determining whether to play heavy as Payton uses the term here. If the tendency is to pass, whether its 3rd and 11 or 3rd and 4, he might go six in the box in either case.
But they can go heavy, as they did against the Seachickens and the Jets. That's when you see Guion and Boyd instead of Daniels and Jones. The OLBs/DE can squeeze inside too.
One thing I read this week said the Packers, despite Peterson's absence, spent the majority of the game in Oakie, with very few 4-3 snaps.