You will need high-clearance.
Many report doing it without 4x4 when the road is dry. Some claim 4x4 is necessary.
Depends on your vehicle, tires, plus comfort and experience driving on dirt roads.
There are a bunch of comments and reports from different people in the following thread. It may help you get a better feel for the different opinions that people have for it: https://hikearizona.com/dex2/viewtopic.php?f=7&t=3871