For those interested, it was quite simple to link the Priceline reservation to MDE. PL gives you two numbers, one is the confirmation and the other is the PL trip number. The confirmation number is usually 7 numbers long and that's the one you put into MDE. It took about 30 seconds. The only thing I didn't like, which was my fault for glossing over, is that PL only guarantees lodging for two and we are four. Luckily, I called ASMusic and the lady said they only have two beds in their rooms, so crisis averted.