It's beena w hile since we did the whole sending 1 person up thing, but the memories made me smile.
We both just walk up and check-in, and normally we're asked about the room type (I love that regardless of what type and rate you reserve, your still asked as if you'll suddenly decide on a less desirable room), and confirm the King Size bed.
However, we don't like to stay at small or vintage properties, so YMMV.