Something looks familiar here...
Evil Coop showed that card to Daria right before he killed her and said "that's what I'm looking for". I ~think~ that the information on the map leads to a place similar to the Black Lounge, could be the White Lounge or some other place? Evil Coop doesn't want to go back to the Black Lodge, because he said he "had a plan" to avoid going back, and his plan worked. So if Evil C~ wants to go to that place represented by the symbol in his card, then it can't be the BL, it's gotta be a portal that leads to somewhere different.
Look above the second triangle in Briggs note......
Sorry Hawk, but it is about the bunny after all.
Pay attention what Bobby said it was.
Pay attention what Bobby said it was.
Hmm? What do you mean, Karen?
Pay attention what Bobby said it was.
Hmm? What do you mean, Karen?
Jack Rabbit's Palace. Bobby named it as a child.
Imaginary place
The symbol for twin peaks in Briggs's note appears in the owl cave 
I also noticed that the owl symbol (which is what I assume Coop showed on the card) is upside down in fire in the cave painting.
Probably unrelated.
It's not about the bunny! ?
I'm sure the red circle and the red crescent are the moons , one dimension it's 2:53 day the other dimension is 2:53 night . Maybe Laura Palmer escaped BoB just before she was killed??? Maybe she switched with her doppelgänger via that strange ring in fire walk with me???
Is it about the bunny or the dog legs ?
Blue-Velvet-Q2-Extended.mp4_snapshot_00.48.38_2018.06.04_09.33.58.jpg
From Blue Velvet movie (a deleted scene).
Or both?
Fire walk with