Hi yvonne, and nyhker,
I would recommend OAP. When I did it (June 28th) there was still some snow very near the top that I avoided by going "up". I have since seen pictures that show a "virtually" clear trail. Of course the recent weather may have changed that. Not sure what the weather was like at OAP, but at the portal there was some flooding, and lots of dirt left in the parking lots.