I agree with the others, but I think it's unusual for an experienced nurse transfering to LD from what most hospitals consider a "related area" (which NICU is according to my manager), to get 12 weeks. At my hospital, which is in a big metropolitan area and has a great reputation for retaining employees and happy patients, only new grads get 12 weeks then are considered a "half person for another 4 to 6 wks. Most experienced nurses get a month or two and then have a mentor to help them. I would insist on that at the very least.
Now, as far as being alone in the delivery room during recovery. I think recessing a baby alone and having to watch mom simutaneously is dangerous. However, my hospital, which strictly adhers to AWWON guidelines expects that of us. I need to check that out, as do you. I oriented on days and as a new grad, towards the end, I was expected to do that myself. Scarier than you know what. Now that I'm going to night shift, thank god, you have a slew of RN's in the room with you at the beginning of a recovery.
If you decide to take this position, I would definitely check out why the other RN's left. L&D is very different in pace than NICU from what I heard. In the most supportive unit it can be an adrenaline rush. If you are unsupported it could not only double your stress but endanger your license. Do your homework and stick up for your self. Worst case scenario at least you have your NICU exp. to fall back on.
Good luck
S