For the Perry, GA hotel, I booked online, printed out my confirmation sheet and took that in with me at check-in.
For the TN hotel, we hadn't booked anything because we didn't know how far we'd get the first day. On the way to FL, I had picked up the TN roomsaver booklet at a welcome center and we chose from there while on the road. We don't have a cell phone, so I just walked in. I said, do you have any rooms available and she got all happy and said, YES! Our rate is normally $74, but I can give you the manager's special of $69! I handed her the booklet advertising $49 and she sadly said, yeah, I can give you that rate...
I love a deal!