Is there enough room for the drainage layer & screen?

This is my first time doing a large vivarium so not sure how deep the drainage layer should be. There is about 4 inches of clearance between the bottom of the tank and the bottom of the wood, I could carve back some of that bottom but figured I would see if this works. I’m fine with the wood sitting in the substrate layer. Was thinking either doing all lava rock for the drainage layer or a mixture of egg crate with lava rock on top. Thoughts? Does the egg crate being 1.5” tall and the lava rock layer being 1.5” seem like it would work? This is eventually going to house dart frogs and have a jungle aesthetic. Open to suggestions if you have better ideas for the drainage layer!