LAX to Anaheim is good way. Taxi would be *major* bucks. It would be cheaper from SNA, as SNA is much closer. To give you an idea, the fare from LAX to Beverly Hills/West Hollywood can be close to $30. its only 7 or 8 miles away.

But if you have to fly to LAX for scheduling reasosons, it might be cheaper to rent a car instead of making tow expenisve cab trips. You don't say how long the conference is.