at the pbh and the rph, there is a chance of free upgrade upon check in time.
loews you first states that if a room is available, you can be upgraded when you check in.
if you arrive early/before noon, your chances are greater of upgraded rooms free.
if you do not get an upgrade, tell the TM at check in, you would be willing to switch rooms during your stay when an upgrade becomes available.
i did that before and was switched on day 3 of my stay.
it's not difficult to move.
you pack all your bags and bell hops can put them in the new room while you are in the park if you so desire.
it seems like weekends are harder to get upgrades than weekdays.
or it was that way the last two years.