Well, if you really want a way around the system, you can haul all of your stuff to the bus stop, and for a couple of bucks end up at the same place.

Unfortunately, the bus doesn't hit the airport as much as it's supposed to, so you can alternately haul all of your stuff to the main road, where it's GOT to stop.

I've done that a few times, and on two occasions locals have offered me a ride, taking pity on my sweaty soul. But that's when I was traveling alone, and had all the time in the world.