Wow we must be in the unlucky minority. We ALWAYS have a hard time finding parking by a building away from the check in parking. So, we usually park in the front, get a drink refill, and walk to our room. 50s parking lot is always a challenge because they tell the 60s, 70;s and 50s all to park there. We have never been in the 80s or 90s though, so I don't know anything about those lots.
We've stayed at POP 12 times so far, at all different times of the year, and have always parked at the check in lot for the whole time because we have driven around and around the other lots and have found nothing when we come back late at night. Early in the day there isn't a probelm but it's every man for himself at night and it is too much trouble.