Every campsite is beautiful. But all roadside campgrounds will be noisy. The river road (Utah state highway 128) is very busy and very narrow. Take at least a half day river trip. You can rent rafts and kayaks all over town. Or get a guide to do the work for you.
The canyon changes so much between sunrise & sunset. See them both. The Potash Rd leads to more camping along the river just west of town. There is mining traffic along this road so drive thoughtfully. This also adds to the noise level. This stretch of road has some nice petroglyph sites visible directly from road.
Also check out the Kane Creek Rd that runs along the southside of the same stretch of river. The river is wide here, so you won't hear the truck traffic so much. BLM has several campsites along this side of river too.
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