You are probably not getting a lot of replies because most people are not understanding what your issue is. (I certainly don't.) You are overthinking this. Put everything you want to draw on a site plan on a layer called, oh I don't know, "Site Plan." Set the scale correctly, turn on & maybe lock the other layers you want to display along with the site plan, and when you are finished drawing, save the view as "Site Plan". Save the currently shown layers as a layer set called "Site Plan" so you can use it on the next project. Send the view named "Site Plan" to a layout sheet. What's the big deal?
If you have multiple types of site plans, as Scott does, you can put information that is specific to that type of site plan on its own layer. You can also speed up the next time by saving things as Favorites. The Active Layer tool is also a major time saver to avoid checking layers as you're drawing.
BTW, you can also try typing "how to create a site plan in ArchiCAD" in Google and will see all sorts of tutorials. I just tried it and it took, all told, maybe 10 seconds to find. Make Google your friend.
Richard
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Richard Morrison, Architect-Interior Designer
AC26 (since AC6.0), Win10