Schoolcraft (Matt),
Contact HCR and tell them what your thinking is.
I'm sure Hill Country wants you to end up walking a way from this "whole experience" being happy.
Particularly in the light you are willing to "deal" a little bit.
Worth a phone call !!!
Lastly, IMO there ain't nothin wrong with having a .300 Win Mag as a back-up rifle on ANY big game hunt.