Refusing to move out of the intersection, for weeks, probably is arrestable. They'll find something to charge you with. Refusal to disperse, if nothing else.
Early on, you could maybe argue you came to protest and there was really nowhere else to park. But after a few days, given the convoy's stated intent was to shut down Ottawa, it's difficult to argue that you're not trying to make residents abstain from their lawful right to drive down Kent St. or Wellington St if you're still blocking the roads when there are plenty of other places you could park and then walk or bus to the hill to protest.
