I stayed at WL over Thanksgiving week and visited during the day for lunch one day around NYE.
My experience was the crowds were "lumpy." Generally speaking, the daytime is reasonable.... no to low/moderate waits. Things pick up in the evening and there can often be a wait. We walked up one night over Thanksgiving week to what appeared to be no line and the CM was like "yeah, it'll be at least an hour." Doh.
Another night I walked right up and found two seats at the bar right away.
The day we had lunch we were seated right away, within 15 mins there was a line.
Geyser Point also unfortunately serves as the bar for both pools (this is my biggest gripe about WL) so that sometimes has an influence on the line too.
That said, there's usually very friendly CMs at the entrance to manage things/get your name on the list if there is a wait.
Not the worst resort in the world to take a little stroll around the building/grounds if you do encounter a wait.
Also obviously my recent experiences were higher traffic holiday weeks, so that may have influenced our experiences - so YMMV!