I had one mother of a "Eureka!" moment on how to get into the swamp earlier today, only to get stymied very early in the next series of puzzles.
Then I started cutting up my graph paper. Blowing through them now, but I keep having to cut out new shapes.... :lol
https://pbs.twimg.com/media/CaG9Vk3UkAAlU4Z.jpg
https://pbs.twimg.com/media/CaG9U4HUsAAt88-.jpg
(not spoilers)
Someone suggested something like this, or Legos, earlier. Some of these become kind of hilarious once you can physically arrange them, but I'd never have come close to the solution without something physical to manipulate.
I know exactly which puzzle you're talking about because I had to do the exact same thing.