Stop making the trip to the SLC Airport worse than it needs to be.
You know the drill.
Arrive at the SLC Airport. Park a million miles away. Think about all the awful things that could happen to your car while you're gone :) Hope you'll get to catch the "super convenient" transportation to the curb. Juggle infinite luggage. Say a prayer as you chase the transport down. Fall out on the curbside drop-off and hope all of your luggage follows. Finally get there and cross your fingers in hopes you haven't missed your flight.
Yikes.
St. George Shuttle will pick up from a bunch of different places in Southeastern Idaho, and drop you off right at the curb.
It's kind of no brainer, isn't it?