"The Bowl" a.k.a. "The Swale" is the long depression in the northeast corner of the park lined on both sides with conifers.
I think the birding, like the weather, changed considerably over the weekend. There were lots of Pine Warblers on Saturday. I couldn't find any on Sunday.
I could only come up with 2 warbler species in over 2 hours on Saturday, but a short visit Sunday morning produced 4, including at least 2 Northern Waterthrush. I came up almost empty at the bowl on Sunday morning, but had much better luck near the Power House. (Again, the reverse of Saturday.)
Two other species of note on Sunday: Pileated Woodpecker (male) and Blue-gray Gnatcatcher.
BB