4runnerguy...not doubting what you saw but we are currently in Moab @ OK RV Park....been here 3 days. We did get to Arches around 8 a.m. both days and sailed right thru. Coming out between 2 & 4 there was a line of about 8 autos but it looked like the normal backup when people pay to get in. The road construction is a pain but it didn't take us more than 15-20 minutes (3 times) to get from where the construction begins then into town where the construction ends.
Snow is predicted for Monday and temps are dropping, so I'm guessing that the traffic volume will start dying down a little.