The only other thing to do would be to sue in court! Unfortunately, it might be impossible to find a lawyer with guts and a spine to defend gunowners! Even if a good lawyer was found, its still likely to be a problem trying to have a fair and impartial trial in CROOK COUNTY given the current political climate.
I posted earlier about having to appeal until out of the influence of Cook.
Since it's a county ordinance, would one be able to start the process now, or have to wait until the day it takes effect, or have to wait until given a citation? Either way, it'll be a long and costly affair. The funny thing is I was unable to find mention of the ban on ANY other RKBA (NRA, GOA, CCRKBA, ISRA, ConcealCarry, 2ndAmendFoundation, JPFO, etc.) site, other than ICARRY; gonna be hard to fight a state AWB when the majority of the state's population lives under an existing AWB and is indifferent...
Comply or move out of Cook: it's the same to them, they win without a fight.
Disobey without being caught: they get "for the children" points, "we" get "pry it from my cold dead fingers" points, nobody else cares.
Disobey and get caught with, say, ONE full-cap mag: I'd expect a County police search (with CAGE advisors, of course) which means everything gets examined and logged, probable confiscation of all semi-autos & magazines for leisurely examination, plenty of snide remarks, entire residence tossed, etc. Even better if they detain you at your job for the search - because it's highly likely most of your coworkers voted for the ban in the first place. That'll look good on your resume...
I highly doubt door-to-door CAGE raids, at least for now. It's just like the handgun ban in Wilmette & Hale DeMar - don't ask/don't tell, don't get caught. If caught, public demonization & a slap on the wrist.