I have a 42’ motorhome towing a Jeep and found plenty of spots able to accommodate my needs. Plenty of shade, but there are also wide open spots available. Occasional ATV’s but I never found them to be a nuisance. I stayed the full 2 weeks.
You can dump your trash at a rest area just 3 miles towards Bryce Canyon. You can also dump and fill your tanks for $10 at the Red Canyon RV park 6 miles the other direction.