You manage to avoid another rogue droid while you rig up a second "drone" to come with you. Using the drone to scout, you make your way back up. It's a bit of a process - with no lifts, it's a manual, exhausting climb up to the level of the loading bay. But eventually, legs and arms shaky, you make it. The doors are sealed, and there's no power, but there is a small access hatch that should lead to the surface. You have everything you need here to rig a grav sled as a makeshift swoop bike, but without power you'll have a hard time getting the large overhead doors open. There is a manual access hatch (another long ladder, ugh!) so you might be able to open the doors manually, but you can't imagine the manual system will be much help - those doors in the ceiling look very heavy. It's either going to take hours, or more strength that you have to work the cranks. Another option is you could possibly rig a direct power feed to a door motor, if you can find a power source strong enough to drive the motivators.
There is also your helmet, which is still with the tribe. If you were to get that back, you could use the comlink to call for help. Maybe heading back there first is an option? But that's a risk - the primitives may not let you go easily.
So, a few hours of cranking, or carrying (or getting your droid drone to carry) parts up the ladder and build a smaller version of a swoop outside, or rig a power supply for direct feed, if you can find the parts.
Getting the droid to carry stuff would certainly save you some physical labour, and give you time to rest as well, so maybe that's the best option.
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