Idea: being able to send a caravan to any tile on the world map and collect resources
How: Simply send a caravan to a tile and when reached click a scavenge button and a instance of a map will open temporarily. Caravan will then be able to collect resources and leave when done.
Why: it provides a low tech option to gather more resources without settling a new tile. It also saves on computer resource use.
Concerns: to avoid abuse a tile will have 3 resource counters (plants, animals, metals). Ex: a caravan is sent to a tile to mine metal and depending on how much metal is mined impacts the counter. This is important because the remaining counter percentage determines the spawn rate of resources for future caravans sent to that tile( I.e metal in this case). To avoid any potential long term strain counters reset after some time (4 years?)
Edit: Words
I am pretty sure that everything you described is already in the "set up camp" mod, if you tweak the settings to your liking.