I had a planned CS, and didn't get skin to skin in the theatre - I hadn't asked for it (hadn't made any birthplan as such) - but as it turned out, the time from DS being whisked out to me being wheeled into recovery was so quick anyway, I don't think I would have bothered anyway.
Once we were in recovery, I stuffed him down the front of my gown, with him wearing just a nappy and a hat, so he was snuggled on my chest, and warm. After a few minutes, I squeezed a little colostrum from my nipple, rubbed it on his lips - he licked them and wriggled a bit, and his legs were doing little froggy kicks, so I figured he wanted to move! so I scooted him over to my boob and rubbed my colostrum-y nipple against his lips. He opened his lips, latched on and that was that.
I'd say DS was probably BF-ing within 15 minutes of being born? I had no BF support, btw, I just read up on it beforehand and did what seemed sensible - and was also very lucky in that I had a good birth and a healthy DS who was a keen and competent BF-er without me really doing anything.
FWIW, I became aware after my CS that part of the reason BF-ing was easy for me to start with was that I wasn't trying to sit around on very sore post-birth bits! Friends with stitches and various wounds found it bloody hard trying to get comfy enough - one friend with an infected episiotomy gave up BF-ing precisely because she could only manage it lying down, just about, and found it all very traumatic and painful. One thing I'd strongly recommend is a big V shaped cushion to prop yourself up with. Moving position from sitting to standing, or from reclining to sitting up etc can be tricky when you are recovering from a CS - a nice big V shaped cushion keeps you marvellously propped up.