Other Car Rental Programs/Partners (ie. Alamo, Enterprise, Sixt) - Avoiding drop off fees?

Have a great rate in March for LAX (March 10-17). Alamo adds $100 to drop it off in LAS - as does Budget. Most others don't. Off course the best base rates by far are with Alamo and Budget. I know it is a long shot ... but any codes/strategies to avoid the drop-off fee?

I used the air line(southwest) site to order after I ordered the ticket. In least Alama did not charge drop off fee in my reservation. I will not use the car until Aug. I worry, too.