Last year my then 20 month old slept in their Pack and play. She was still in her crib at home and she had slept in our Pack and play at grandparents and uncle's houses. This year we are going to go with the bed rail and big brother because she is in a big bed at home. I am a bit worried about settling down with big brother! She may end up with me and DS end up with DH.
We have a Wiggles ready bed that she now uses at my brothers. The first two times she ended up with us. Last time she slept all night in it, but it took longer than normal for her to settle down. She loves it though, and I think it will work better as she gets older and more used to sleeping in it.