An acquaintance who is in a position to know has said that the tactic the police may use is to arrest as many protesters as they can without much regard for whether they are especially violent or not to clog up the court system so badly that the protesters cannot get bonded out for 3-5 days.

I have been told by a jail supervisor that Cook County jail is sending thousands of its prisoners to other county jails across the state to make room for the thousands of protesters planned to be arrested. The feds are paying $45 a day per prisoner for the use of the facility and are also paying for the transportation costs involved.

I still think your best bet is avoidance if indeed the police tactic is to randomly arrest protesters primarily with deliberate aim to screw up the court systems to keep people locked up as long as possible. Since the vast majority of the protesters are not violent and probably are not even committing any crimes, if they ever make it to court they will likely be released without much in the way of bond and eventually the charges will be dropped or dismissed.