Just a heads up that the rawfeeding Yahoo group is kind of rabid. Ok, that's a lie. They are REALLY rabid. I ended up quitting the list. Take things you read there with a grain of salt and don't let them freak you out. They firmly believe that if you don't feed red meat (which apparently includes pork) 99% of the time your dog will suffer for it. Whatever.
Re: chicken quarters, you definitely do NOT need to add bone meal or anything. They're actually considered too bony to be ideal. They work well for Inara - she seems to need the extra bit of bone to avoid soft serve poo. I have no idea what the ca/phos ratio is. It's easy for me to say because I used to be just like you but DON'T OVERTHINK THIS.
Inara exists primarily on chicken quarters (chicken necks are a choking hazard for our dogs as well as too bony, and backs are too bony unless you're supplementing with extra boneless meat). She gets half of a quarter per night, with a small (2 oz, maybe?) piece of boneless pork and then a few small pieces of liver/gizzards/organ stuff. I squirt some salmon oil on, and voila - dinner. That's her menu 99% of the time. I got some whole fish from a friend, so Inara is having half of a fish tonight. But normally it's chicken.
And most boarding places are very willing to feed raw. Mine just asked for explicit directions, so I put a chicken quarter in a ziplock bag and then my directions were: open ziplock, dump chicken on floor, supervise.
She was a little surprised it was so easy.
So like I said, try to relax with this. It's definitely something you can learn as you go, and it's easy to tweak on the run.