Kylee, I can say some things with authority. Modules were run in the past, and stories have been told about those modules on the field. Thus, it might not be considered meta-gaming to learn "widely-known and bragged about" in-character details from an out-of-game source like this message board. If I were to type this as an in-character story, I'd put it in one of the "in-character" forums, but I'm going to just throw out some OOC historical facts, on the off chance that someone might be writing a module with Planar Lore: Wyld in mind.

People from Ilvaresh used to tromp across the Wyld plane every few years. Myshalla's Gate was an extra-dimensional portal that could open into a single location on each plane... unless you had one of a handful of artifacts that would let you control its terminus. The Gate used to stand down low trail, a few dozen yards away from the Tower in Aladine. It was destroyed several years ago.
Part of the Wyld Plane is an idyllic forest, populated by normal and giant animals, some lesser Fey, and ruled over by Myrhanna, whom the humans call Mother Nature. She reigns from a Garden, with tall hedge walls, and a gate guarded by a green drake, a griffon and a unicorn.
Part of the Wyld Plane is governed by the Faries. Humans often call it Arcadia or Underhill. Wild speculation says the Sidhe are in charge, and something about a conflict between the Seelie and Unseelie Courts. With Faries, anything is possible. We don't see many Fey in Novashan because all of the Fey for hundreds of miles attacked the stronghold of a villain called "Roland of Lorax" in 995. They asked for aid from their human and elven allies, but all of the heroes of Novashan were busy fighting Lareth and The Dark. It is believed that all of the Fey perished in the attack, but rumors persist that they did not die, but were trapped on another Plane when Roland moved his Tower off the Central Plane.
Part of the Wyld Plane is a shifting, changing, chaotic wasteland, where the land washed up against the clouds, and the lakes sail by far above. Anything is possible. No one knows if the Realms of Chaos have a leader, or whom it might be. BUT... from experience the PCs know that the Chaos Wastes are a quick way to get some one place to another, as the random paths of the Wyld Road touch many places in all of the Planes except the Neutral.
There is a strong argument that says the Elves of Ashan are close kin to the Fey, and to the beings of the Wyld Plane. The Endless Forest, and to a lesser extent Arcadia, have an inherent and insidiously seductive quality to those of elven blood. The Forest is peaceful, serene, harmonious, carefree, and eternal. What some would consider perfect. Many elves and half-elves are Very reluctant to leave the Wyld after even a short visit.