These are all great suggestions. Jayden, that's a helpful link. Im using the unique site conditions to grow plants that tend to live in a more arid environment. To supplement, the intended design will collect rainwater from a sheltered seating area, so that can be easily used to water the tree guilds. Also I'll probably want to plant some companions with deep, "groundbreaking" roots to help deal with compaction.
Roxanne, beautiful mushroom idea, I'll want to use something like that in the future.
Any thoughts on toxins leaching into soil from asphalt? My initial thought is "these would be oil based toxins and therefore wouldn't be taken up by plants," though I'm not sure.
Thanks for the help internet team! This is my first permies post and I'm finding it thought provoking and well worth it.