Out of curiousity about how many RPO's does a typical high school have that runs the spread offense?

It seems to me like there are mainly two types of RPO's. One where it's pretty much two options- either the QB hands it off or throws it or the almost triple/quadruple option type where a QB can hand it off, run, or pull up and then throw it if the defender assigned to the pitch man attacks the QB and a WR is left vacated. Am I fairly accurate in that overgeneralization?

Are RPO's exclusively run with zone blocking schemes? Or are we seeing RPO's where a guard pulls and things like that? I know offensive linemen getting too far downfield can be a risk so I could see where zone blocking schmes may reduce that risk some.

I'm asking this because I'm curious and because I'm expecting to more of this with Joe Moorhead's offense next year.