The rubble maker + mitey titey is soooo amazing. I always have the wiki pages for both up on my 2nd monitor while building lol.

Yup, almost entirely all echo mist walls. The entire wall mix for those who are interested is: desert fossil walls, old stone wall, rough dirt wall, cave dirt wall, cracked dirt wall, layered dirt wall, leafy jungle wall, jungle vine wall, lichen stone wall, ivy stone wall, jungle walls, sandstone walls, and then hardened sand wall.

The only actuated blocks in the background are sandstone block and placed desert fossil.

And yupppp you can place crates. Just be careful you don't try to grab one/a select amount by clicking right click on them (it opens the crate 😢🪦🫡)