Wiping them would only be temporary (like probably a few seconds of server flipping out and then catching up depending on the type of thing you destroy) because you are doing nothing to the clutter spawners. If you are interested in changing what spawns you would instead make adjustments to the foliage setting blueprints that were mentioned earlier. So just keep your reference viewer with a depth limit of 1 and go through each submap to see what folliage setting blueprints you would need to subclass and change. As for getting them to actually load, they are placed on the map so essentially you would have to modify whatever map you are interested unless someone knows some other method. You would need to watch at a minimum brick’s mapping tutorials on how to rework the clutter here: ARK Dev Kit Lesson: Clutter Layers - YouTube
I haven’t meddled in the mapping side of UE4 so I’m probably not the best person for this question.