Wasn't at Waverly this time round but I've done two overnight stays there over the years and both times the 4th floor corridor hit me with something I can only describe as a pressure change - like the air gets heavier around room 502. Not just atmosphere either, I've captured some genuinely anomalous readings up there with a trifield meter that I couldn't explain away.
Would be really interested to hear what specifically you felt and whereabouts in the building. In my experience Waverly is one of those sites where the responses are actually pretty consistent across different visitors which is what makes it compelling from a research standpoint rather than just being a creepy old building.
Did the guides take you through the body chute? People tend to either feel absolutely nothing down there or it floors them completely, very little middle ground in my experience. If you've got any photos from the visit worth sharing post them up, always good to get fresh eyes on anything anomalous from that location.