Yes, the $159 per night at PPH is the rate I am getting too, but mine is with the PIN discount offer. Yours is probably the AP holder discount rate, right? Well, they tell you that rooms are not available until 3 p.m., but that is not always the case. Check- in time has been a widely discussed topic on these boards. Everyone has different experiences. My experience last year in the supposed 'off-peak season' at PPH - which was the next to last weekend in September - was that we showed up at around noon or 12:30 p.m. and the room was ready for us then. Again, it was the off-season. You are going during what is still considered the peak season, so your room might not be available until 3 p.m. Also, last December, we stayed at the GCH, and I literally was standing at the front desk at 6:30 a.m.!!! I did all my pre-check-in stuff then, got everything squared away, and they gave me my room keys so I never had to go back to the front desk later in the day. All we did was call a number they gave me and ask if the room was ready yet, and it was ready at about 1:45 or so, maybe a little earlier. And that WAS peak season.
So the bottom line is, you can check in any time you want - in fact, the earlier, the better, to get all that paperwork out of the way so you don't have to go back to the front desk and stand in a long line in the afternoon. If your room is not ready early, they will probably give you your keys up front and have you call the number I called to see if the room is ready later in the afternoon. I suspect that many times the rooms are ready before 3 p.m. - maybe some are even ready way before then - but people don't know it because they hear 3:00 p.m. and stick to that.