Apocalypse map

If I were to make a post-soviet apocalypse map, should I do a Tarkov-esque Raid mechanic (You have a central hideout, with traders, storage, etc. In which you start a excursion to an area of the map and loot and complete tasks given by the traders, and then you extract from the area back to the central hideout). Or a traditional open-world map, where you are free to move around, kinda like metro, stalker and the like.