Save/Load Objects settings(position, rotation ...)

Hi guys,

i have created an editor in unity 3D, you can import a 3D model, walkaround and place scanners around that model. Scanner is a prefab with lot of scripts,lights and other stuff which you can set up in the scanner settings. I want to upgrade my project with a save/load function so i red something about saving in unity (serialization , something with xml...) ... but i dont know which one method is better for me .. or if it isnt better to create my own .. but i need some help and ideas .. My first question is .. if i can save my editor stat to an file so the user can save different configurations .... Second how to save some values of an object .. i have an idea to save all scanner's settings (mostly float values) .. and then during loading just create scanner on a saved position and set the saved values ... but how can i save values of a scanner if i dont know ho many scanners will the user place ??? should i use some struct or something like that?

Thanks for answers :)