Matt, try looking at two tutorials in the "understanding" series on this website, they deal with soft-proofing and printer colour management.
If the answers are not there for your questions then then the "Camera to Print and Screen" would be the way to go - since CPS was made before the release of Lr4 all the softproofing and colour management are delat with in PS5.
Interestingly, it is easier to follow the videos than a long-hand description.
Regards
Tony Jay