Finding out what sets these bags belong to? I recently opened up a Sterilite box of LEGO from a garage sale to find some unopened bags.  How can I figure out what sets these belong to?
















The Bags have numbers on them if that helps...424R8 is on a Bag 2 and a Bag 4.  324R8 is on Bag3 and a Bag 5.  211R7 is on a Bag2.  407R8 is on Bag 3.  450R6 is on a Bag 5.
Based on

PLATE OCTAGONAL 10X10 W. SNAP
PLATE OCTAGONAL 10X10
Scrolling through the instructions

First bag 2, first bag 3, bag 4 and first bag 5 (pictures 1, 3, 5 and 6) are from 75953: Hogwarts Whomping Willow