Masteria Expansions, Names and the proof for each

I would go for that if Altair Camp appeared to be in the trees, but from all appearances wandering through there it's on solid ground.

Well, if the height was an issue, couldn't that part of the forest stretch a bit further north?
A slight change of elevation could change the situation. You also got the land masses that would appear later and eventually support the Eos and Helios towers of the Ludibrium kingdom.

Then again, it could be one of the many things that leave us with no idea how they could work.
The library's currently active section on Korean Folk Tales is an example of this.