<font color=navy>Patti,
The earliest that I've known someone to check in is 11am (usually it's 3pm). It depends if a room is available, etc. When we stayed there, I was told that there was no late check-out, and if I wanted to stay later than 11am, I would be charged for another day.
Of course, there may be exceptions, but I don't know of any.
An alternative is to store your luggage w/the bellhop, and if you need to change, you can use the restrooms off of the lobby.