At the Poly this past August, our daughter had a portable crib. I was under the impression that all the hotels had pack n plays. Apparently not. But she had been in a port-a-crib the weekend before in Dallas so she was quite used to it. They even had a Mickey Mouse sheet!
They are about 3 feet long and about 1 1/2 feet wide. It fit in the area between the "hallway" to the bathroom and the desk, where our connecting door was.
I think it was wood, but Jenny Lind (spindly) style. Your granddaughter will fit just fine.
I'm sorry, I have no pictures. Good luck.