re: .308 or 6.5 creedmoor for deer hunting?

Both the 308 and 6.5 CM are fine rounds. I've hunted extensively w/ both in bolt action handguns (one was actually a 260 Rem, but it's a ballistic twin to the CM). No doubt the CM is a good deer hunting round, but in many circles it has taken on mythical properties. If my shots were inside 150 yards and I could only have one of the two, no doubt it'd be the 308. For what you describe, it's more flexible than the CM and (usually) has easily available ammo that's well developed and has a wide range of useful bullet weights. You'll be well off w/ either. Be sure and practice plenty.