The island here is a rainforest technically so that makes sense, I didn't something dumb an used some dirt outside that I cleared of noticeable bugs or anything at the bottom and an inch of substrate since that's most of what I could conjur at the time, I'll probably be trying to just use as much substrate as I have (again not much I only have the amount I got with my Brazilian black) tomorrowAll I'm finding is repeats of the information in the Wikipedia article on different sites. Cool forests with a sandy soil, moss and wood incorporated into it's burrow structure.
At night it waits at the burrow entrance for food.
So I guess as much compressed substrate as you can provide and some leaf litter in a corner. Rather than leaf litter you could substitute sphagnum moss torn into small pieces, that would avoid introducing any nasties from leaf litter and resist mould better.
For substrate a mix of coco peat and sand is usually suitable for most animals, 1 part sand to 6 parts peat by volume is a good mix, perhaps start at 1 to 3 and see what you think matches nearby sandy soil.
Really, I would think that treating it as a burrowing tarantula would be fine. I'm not sure about moisture or a water dish, but "cool forest" would seem to indicate that some moisture would be needed, I would add a very small water dish and perhaps mist the sphagnum moss occasionally, leaving droplets on the wall of the enclosure.
If the enclosure allows, providing a moisture gradient would be best, keeping one end dry and one end damp. Of course I always prefer a false bottom system, to have a moisture gradient from bottom to top preferably in combination with a linear gradient but that's up to you, it's probably not needed.
Hopefully someone who knows more about this actual species will reply, the trapdoors I'm familiar with are arid species usually found in grassland.