Easy chunk prefab creation

In my infinity runner game, level is generated randomly , but after a w$$anonymous$$le I decided to use predefined prefabs of parts of the level and place it randomly to make level more organised. However I still want to spawn each object in t$$anonymous$$s level prefab from the script, not the entire prefab with all the models. The reason of t$$anonymous$$s is because I want to use object pooling, as well as to add some variations to the objects in the level prefab when they spawn (randomly rotate,scale,etc).

I see one possible solution :

1. in the editor we somehow create an array of objects we want to spawn , with position and rotation values.

2. In game, when we instantiate new world area(chunk), we use t$$anonymous$$s data and instantiate each object in the array from script.

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However I don't know how to setup t$$anonymous$$s prefab/array of objects with all the info, in a somewhat user friendly way , maybe it's possible to make a regular prefab with all the stuff , then some script saves all values into array (in editor, not in game) , or maybe there is much better way to do that ?