Here's the AirportBus web site...
http://www.airportbus.com/apb6_001.htm
It has phone number, schedules, prices, pick-up points, and hotels served. And yes, the Anaheim Hilton is among them!
Their info conflicts on whether reservations are required for the return trip to the airport, so it would probably be a good idea to give them a call ahead of time, as well as to confirm schedule times.
And, since you're going to be at a hotel served by them, the AirportBus definitely wins out for both price and convenience, if you don't want to rent a car.
As a former Chicagoan, I definitely concur with
MRLIMO. West Coast cabs are definitely more expensive than Chicago, or just about any other city I've been to. I'm less than a 10 minute drive from the airport, and the fare was $9.50 before tip. Best to avoid cabs if at all possible.
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"Read my lips! No more benefit cuts!"...Gordon Bethune