People came in and brought homes with them (sleeper cabs, RVs, etc). Now they have set up permanent structures such as kitchens and other facilities (today they brought in a sauna), and have been stating repeatedly that they are in for the long haul.
There is a reason that's called an occupation. A protest is normally a discomfort for the protester. Enduring the elements. Going without. But waving a flag and chanting slogans that convey a message. Here we have a bunch of people in transport trucks blasting their horn 24/7.