My understanding is that full size cribs are being phased out and that there are very few left. I can tell you that in 5 trips with my boys we requested a crib each time (all levels, from value, moderate, and deluxe and DVC, and most split stays). Never once did we get one. I would go to the front desk and nicely complain but heard the same story over and over again. Trip #6 we were tired of pack n plays and rented cribs from a baby's best friend. Well worth it and I highly recommend this company. We are past the cribs now but I would use them again if needed.
For location I would choose the magic kingdom resorts. There's just more to do at the MK for a little one than at the other parks. Resort in particular woukd be the CR. That walkway to the MK is golden. It never has a line to wait in, never breaks down, and never asks you to fold your stroller. It's our favorite resort for transportation reasons.