We did a 10 day trip in a pop-up camper awhile back. On the weekend, a large group came in on Friday night, setting up late at 11pm and very noisy. Was very surprised Disney allowed check-in so late.
Their second night, the group was loud until 2am. My husband complained along with 4 other people from our loop, nothing was done that night but we were given one night refund.
Fortunately, the group was only there two nights and the rest of the trip was extremely relaxing and enjoyable. The campground is beautiful.
I would think in a motorhome, the chances of this kind of disruption would be much less bothersome than in a tent or pop-up.
Last winter, we encountered loud, rude teenagers at Port Orleans Riverside after midnight, banging on doors and chanting. So rude people can show up anywhere, not just the campground. Go enjoy the campground!