Campspreading

We had an odd thing happen last year on the July 4th weekend on Oregon Coast. Middle age Couple pulled in next to us in a really big site .with a long trailer pulled by an escalade and setup coolers full of booze, throwing games where our rig would be the backstop, chairs in a big circle, every sort of paraphernalia I've ever seen of patriotic Americana gadgetry- then started blasting patriotic mix tapes (ie Neil diamond - coming to America!!). This was all setup by 2pm. We thought they seem to be pros and are getting ready for a massive blow out gathering and we will not be sleeping tonight and may need to leave. We went for a walk and came back an hour later and everything was put away, music off, coolers under rig, chairs folded, games gone etc. They had retreated into their trailer not to be seen again. We left as scheduled next day and decided that was a bullet dodged and no more camping on the 4th weekend or first weekend in Canada.