We did baby swap on our last trip - mostly we went back via the fast pass line, the only area (that I remember) with an "on the line" waiting area was Kali Rapids. Most of the time I just waited outside the entrance - sometimes there was a little playarea (like by Splash mountain & BTRR. My DS9 loved it and DD3 didn't notice! It worked great - My son loved going twice and my DH & I loved that no one got left out. Except DD but she didn't even realize! Our next trip might be a different story....