Thanks, guys, I feel less scared about traveling then. I also saw the thing about only being able to enter via a land border with a CoPR, but I guess they only say that because airlines won't let you on board if you're a Canadian PR and you don't have your card.
I was always skeptical of people saying the CoPR wouldn't guarantee you re-entry into Canada, to be honest. I know it's not ideal to not have the PR card itself, but if you're a PR, you're a PR, and the CoPR should be adequate proof of that, I'd think.