Welcome to the forum. Pick a unit and go, in a few short years you’ll start to figure it out. They’re all crowded, some have more people and elk than others - all that info is available on CPW’s website in the statistics page. Good luck!
If we found such a thing as an OTC unit with less people but lots of elk (a good unit) we'd all be going there ... and then there wouldn't be less people anymore.
OTC units can be ok for elk but there will be lots of people.