I worked at a very large state park in Oregon for 2 summers while going to community college.
The worst group campers by far were church groups and an environmentalist college group named OSPIRG.
The best group campers were the biker groups. They rode in, set up camp, had a good time, didn’t disturb others, and left the site as clean or cleaner than they found it.
The punks on the rice rockets are not real MC gangs. They are the rice rocket version of the jerks in Portland, OR on bicycles that act like militants and are above the law.
In my experience, I have found everything you said to be true.
I had a few friends who were Hells Angels and tougher than anything I knew. Best people on the planet and one was a serious student of the Bible. But you mess with the meek around these guys and Hell is headed your way.