Planewalker's Guild
And so, with their goals split, the planewalkers decided to split apart for now, each pursuing their own interest among the two choices. one begins looking into details on the endless winds of Pandemonium, while the other investigates important information dealing with the shifting morass of Limbo. Some may, of course, be more inclined to check into their destination more deeply than others, but at least some awareness of the more important details of their destination often spells the difference between pain and inconvenience.
For the trip to Pandesmos, there seems to be little in the way of permanent habitation. The best bet for the far point of their Staircase travel seems to be a complex kept by the Bleak Cabal, a sprawling building known as the Madhouse and kept as a waypoint for travelers, a place where they can relax from the never-ending winds of the plane.
The winds of Pandemonium, breezes that grow into gusts the closer one comes to the plane's heart, can drive a man insane, the eternal din driving itself into ones mind if not shielded against. Earplugs function well enough, thankfully, but they are an obvious inconvenience. And of course, there are the other troubles brought about from an endless wind; speech grows difficult, as do the chants necessary for casting spells. Torches are near-impossible to keep in all but the calmest areas; even more aggravating, given that the plane is entirely free of natural light, with not a speck to show the way for those that require it but what they bring with them. Thankfully, magical light is unaffected, a small favor in a plane that doesn't seem to want people traveling through its depths. It's little surprise that when a powerful being wants to banish something for eternity, more often than not it's banished to this realm.
Meanwhile, Limbo is somewhat more easily traversed. From inquiries about the guild, there look to be two possibilities for entrance there. For one, they can attempt to enter through one of the fortress cities of the githzerai. A stoic race that frowns on outsiders, but doesn't entirely loathe them as their Astral cousins do, it would be likely to be tricky but, if its citizens were properly negotiated with, would make for an excellent base of operations, with many resources for them to take advantage of with the proper funds. The alternative is a small village known as Barnstable, a halfling settlement floating freely in the stew of chaos, just keeping itself in one piece thanks to the efforts of its citizens. Although far more open to travelers, its size naturally means that they would have much less to use in their attempts to gather and hold onto chaosmatter.
And of course, the plane does have its own natural hazards. One can swim loose in the matter, but it naturally tends to try to break a person (or object) not native to the plane down into its base components, making it naught but itself. This property will likely be the biggest obstacle to transporting it. Of course, some creatures may luck into being able to live in it without harm, but there's no way to predict such skills before a person actually enters Limbo. Alternatively, and the way most non-natives travel the plane, a person can shape the plane around themselves and their allies, forming it into a solid surface (or liquid body, for some) to walk on, building a road ahead of the travelers while breaking it down behind. Entire fields can be created in this way; for the most skilled, buildings and even plant and animal life can be formed. Some few that have received the proper training can maintain such creations unconsciously, but for most, it's a conscious matter that must be the focus of ones thoughts in order to continue to exist, ruling out participation in anything but movement and light conversation. Even sleep must be foregone to maintain a construct for those, usually leading to groups trading off responsibility rather than leaving all focus on a single person. With skill, a person could shape their own realm here, their own realm formed exactly to their tastes and preferences, with only the inhabitants of the plane to ruin the traveler's view of paradise.
Arcane spellcasting effects
Pandemonium:
Limbo:
Anyone that's doing more detailed research, or making other special preparations before leaving, don't forget to post such.