Make sure all the correct components have been greased. We had several noises coming from our Reese hitch. Most of them want away when I greased up the ball and weight distribution bars. Ours still makes noise now but it's only the sway controller moving back and forth and it only happens when I turn.
One thing to mention.....My sway control broke last year. Evidently it happens a lot. My dealer said that before you back in, you should disconnect it. If you pivot too much, you can break the sway bar. So you could disconnect the sway bar when you first pull into the campground. This should eliminate all the noises. Later.
Rich & Kay
'89 Son, '97 Daughter
'17 Flagstaff 8528IKWS, '14 Silverado