So yeah before you ask this is a straight rip off from UO, but I think it'd fit nicely here to give players stuff to do

Sometimes looting critters you'll find a "treasure map" which can take various form: a book/letter in which a raider hastily coded the location of some loot stash or of a small community easy to attack, a holodisc on a BOS guy with a mission order to go retrieve stuff from a squad killed on a mission, a radio transcript of a detress call of a caravan that was wiped by deathclaws, a note from a scavenger who found in the ruins of LA a pre-war shop burried under rubble and miraculously not fully looted.....you name it.
Then if you use the "use" item on the book/holodisk/map, it does a science/outdoorsman/intelligence/speech(?)/whatnot check and if skill high enough and success, the map basically gives you a location (XX/XX zone coordinate), to which you go. You enter the zone, use science skill on the item, get teleported (like when building tent) to a ad-hoc location which contain, back to the above examples, the remains of the caravan, the entrance to the military facility the BOS squad was investigating, the innocent farm the raider was planning to attack, etc.... and obviously, possibly some critters of some sort. May as well be a simple chest buried under a tree (the raider could have done that.then you'll need a shovel).
and the LEWT . Behind a lock and/or a trap.
There could be different difficulties for "maps" with different rewards and different levels of skills.
Idea to flesh out if you like!