Holy far distance traveling Batman!
I can guarantee that you can make any trip in Elite and is nothing compared traveling 2000km in the belt in Starbase. And i made one-year long circumnavigation expedition in Elite so i should know what im talking about..
What a journey it has been..
So, me and my friend left Origin station 4 days ago in his long distance hauler, meaning to go and find the more expensive materials, since they are located far in the belt.
For navigation, you only have
ISAN system, (Integrated System Autonomous Navigation) where you have a navigational origo at the Origin stations and navigate using the X,Y,Z grid.
In this picture for example, our ship is located approx 912km from the Origin stations and 2km above the middle point of the belt, "heightwise".
Max range for ISAN is currently approx 1000km, so if you fly over 1000km, you will lose contact to the beacon and thats when you are lost if you are in the belt as you dont know where is up, down, right, left or any other direction. In other words, youre pretty much f*****.
Somewhere deep in the belt:
First, we headed under the belt as its the fastest way of traveling since you dont need to watch for the asteroids.
600km later, we took course almost directly upwards, (Y coordinate) and began approx 250km journey to the center point of the belt.
At some point we needed to refuel our fuel rods and thats when the first mishap happened. My friend was a bit hasty jumping off the ship and while ship needs forward thrusters for braking, he jumped right in front of the thruster, vaporizing him instantly, putting him back to the Origin station.

So, he immediately went to ship designer to make a rescue shuttle to get back to me.
Approx 8hrs later he was back and the ship at the right is his rescue shuttle:
At that point i had made already my way to the center of the belt and had found some rare materials, when we hit another mishap.
The rescue ship was running out of propellant, so we needed to figure out how to refuel it.
Luckily, in Starbase you can refill ships from other ships so we plugged the connection between the ships resource bridges, set the other bridge to flow out and other flow in and refill was under way.
Unfortunately, theres some weird bug atm which causes the fueled propellant to disappear if you touch the ship with any kind of tool. Or thats our own reasoning.
So, we needed to refuel many times and soon realized that we cant refuel much longer so that the main ship gets back to the station.
Soon we realized that we are not going to make it, when we got the idea that we could craft small propellant tanks (we had only small tanks researched in the research tree), but for that we needed ice and for tough luck, we were at the zone in the belt where was no ice. Just a day earlier we passed the zone full of ice..
We were really in trouble getting back...
Next day our surprise was big when the main ships tanks were all full.
Apparently, theres a bug which causes the propellant to mystically "return to sender" for a reason or another. Obviously, we filled out a bug report.
So, we were good for a while and continued to collect rarer materials and slowly heading back to home.
Next, we found out that the rescue ship was running out of generator coolant, as my friend didnt put radiators in the ship, so we needed to craft coolant.
We found some materials for the coolant crafting but soon realized that this isnt going to get us back, so we decided to rip few radiators out of the main ship and install them to the rescue ship. It worked, for a while..
Then the main ship got into trouble as it didnt have enough radiators to keep the generators cool, so i couldnt fly with 100% throttle all the time as the batteries started to dry out.
There was few mishaps more but i cant recollect all of them, it was really hectic trip and we had genuine "Apollo 13 feeling" when we finally saw the station 4 days later.

Yes, we got back mainly because of a bug for our favor, but still.. (without that bug we would have been forced to leave the small ship and go look for the ice in the big ship).
It was approx 2000km trip, but never i have been so genuinely worried that we cant make it home. Truly great small trip.
We made few big mistakes, first, leaving for the trip with way too few spare parts, crafting materials and with way too big confidence that nothing could go wrong.
I have circumnavigated the galaxy for one year in Elite, but it was nothing compared to this...

This game gives you ultimate tools to get into real trouble if you are not careful and plan your things properly.
Eagerly waiting for the next trip..