Not sure of the rep but did a few camp sites on MT @ delivery menu @ recover a box. Only did two of the camp sites and only one of those had npcs that engaged me. A few loot boxes scattered around. Didn't see any weapons boxes on my 2
I've been making regular visits to one of the abandoned outposts. It's random (maybe 1 visit in 4) whether NPC's are present or not, but the Nomad's guns tend to take them out reasonable quickly when they are present (and the tray on the back is useful for dumping bodies to loot direct to ship inventory)... I just wish they'd do something to stop the windows on the Nomad scratching so badly if anyone looks at them.
I think I've only ever found a box for a delivery mission twice in all my visits, but I didn't have the option to select a mission to collect a box from the site at the time (there was one that was at another outpost, though), so not sure if they were for mission there, or someone left them as navigation markers.
No weapon boxes, at least at the site I've been visiting (nice and quiet with everyone distracted by Orison\Jumptown events... I think I've seen player ships 3 times, and each time I left them to do the looting), but there's often lots of Dolivine in boxes, and I currently have a large (pristine), a medium, and a small (both damaged) Atifact fragments, damaged UNE ingots (1 silver, 1 gold), and 5 medals - Tevarin war service medal (1 Damaged, 1 worn), UNE unification war medal (Damaged), Tevarin war service marker (worn), and a UEE 6th Platoon Medal (Damaged).
Loot tends to be boxes with either armor or food\drink, flares, multitools and attachments, dolivine, misc items (ranta dung, etc) and rare artifact fragments\medals\ingots (If a box contains these rare items, there seems to be 2 random rare items (from memory, 1 medal, 1 non-medal) in it along with the standard misc items (I don't recall if dolivine is present or if these replaced that)).
If looking for the outposts, here's the locations I found online for them (I haven't visited them all, so can't confirm these are all correct).
Abandoned outposts:
New Babbage, heading 67 for 39.4 km. outpost is between 2 rock ridges.
New Babbage, heading 254 for 51.1 km. Outpost in forrest.
New Babbage, heading 205 for 440 km. Outpost is just up from lake along river
Shubin Mining Outpost SMO-13, heading 103 for 19 km. outpost is in trees on plain
Microtech Data Centre KH3-AAE-L, heading 286 for 14km
Reclaimer:
Ghost Hollow OM3 bearing 352 pitch 6 or Microtech Data Centre 4HJ-LVE-A heading 04 for 406km Outpost is next to small snow capped mountain surrounded by forrest.
I'm considering switching to the cutlass red for future visits, as it should hold a mule (for loading armor items onto), and makes food\drink needs easier to take care of (lie down on med-bed for a few seconds is a much easier option than move food\drink to hand, remove helmet, leave inv screen to drink, then return to inv screen to replace helmet and dispose of drink bottle).