Thanks for the replies and getting the Jay Gatsby reference haha.
Actually I was looking up thread after thread on this last night in the wee hours of the morning, desperate for hope, and I didn't realize this was a Retina MBP thread. I have a 2012 13" Macbook Pro, bought it in January of this year.
At first loosening the bottom cover screws (just phillips-head!), everything seemed to be fine, but the creaking came back. It creaks at about 80 degrees, slightly folded in towards the keyboard, and I'm not sure if it's just chance or from my taking off the back cover to replace the HDD with a SSD and upgrade the RAM... At about the same time this creaking started happening, I tried out an InCase hard shell case and took the bottom cover off to clean out any dust... Of course there was hardly any.
Anyway, if I repeatedly move the hinge back and forth past that 80 some odd degree "sweet spot", no creaking, it's usually when I open/close it slowly... In any case, I don't think it's worth the 5 hours there and back to the closest Apple Store, especially if they opt for a repair, in which case I have to DRIVE BACK the following day/weekend, I mean the thing still works perfectly, and according to all the threads and replies around the internet, this issue is relatively common, rMBP or no.