A suggestion - Caravans. I was thinking that native tribes could continue to use wagons and pack-animals, like vanilla DF, but traders from other colonies might use air-tight transports. In other words armored trucks filled with canned food, extra equipment, and finished goods. Maybe with guards riding in small troop carriers?
To suggest that they had to cross harsh environments and deal with hostile creatures to get to you. Not sure how a liaison would get to you....armored car?
The problem with that is that the tag that makes wagons 3x3 also makes them need to be pulled by something else or they just break if you're okay with it being a single tile it'll work just fine though, as the carrying capacity is not related to that tag
Would it work if the colonists used wagons but they were more like trailers which were pulled by ATVs? Or maybe imported horses? Great, now I am thinking Firefly.
These are actually good points. I had envisioned the colonists using a large transport of some kind for trade, but I honestly haven't put that much thought into it. If 3X3 wagons require something to pull them, I'll probably just have a single tile transport instead. I was already planning on the colonists having a variety of robotic "animals" to help them with various things, so a cargo-hauler robot wouldn't be unusual. As I understand it, I can set the carrying capacity of animals to whatever I want, so I'll probably just give cargo-haulers a capacity similar to, or maybe greater than, Vanilla wagons.
I like the idea of an armored car for the liaison to travel in. I don't know if it's possible to make vehicles like that in DF, so it might just be a transport bot, or something else that he "rides". As for guards, I already have a Sentry Bot planned, which can equip very heavy armor and can duel-wield auto-cannons and/or railguns. That should handle most security needs lol.
On that note, here's the promised update
12/15/2019: Electricity added to the game. At the moment, "electricity" is actually an inorganic substance that is produced in the various power-plant workshops. It's usually a liquid, with a freezing point of 0 (which I understand to be considerably colder than absolute zero, so there's really no reason it should ever be a solid), and a boiling point of 10,015, or the average temperature underground. The goal is to have power plants put the electricity into "batteries", which in game terms are just buckets with very specific crafting requirements. Since it is a liquid, and I don't know of a way to make a container that can't be dropped or spilled, the boiling point is rather mundane to allow for the electricity to evaporate so you don't have puddles of electricity lying around. Electricity has 0 density, 0 molar mass, and 0 for all of it's material properties (shear yield, shear fracture, etc.), to reflect the fact that it's not actually something you can touch or hold. My hope is that electricity will exist while it's in a battery, but if the battery is "spilled", the electricity will evaporate and essentially vanish. I don't have the nessesary buildings and items in game to test this yet, so I don't know if it actually works yet.
I had considered giving electricity a more realistic temperature, but I found that it would be over 60,000 in game units (based on the temperature of a lightning bolt), considerably hotter than dragon-fire. I'm not sure what trying to transport that would do to people with the way the game works, so for now it's not realistic. Shocking, I know lol.
Progress is probably going to be slow for a while, but it will occur. I work at a highschool, and this coming week is semester finals week, so it's going to be a bit hectic. After that I'll be on break, so I should be able to get some more done then.
As always, I love the suggestions and continued interest! I honestly didn't think anyone would be interested in this, so I greatly appreciate the suggestions and discussions. Keep 'em coming!!