If you arrive on Saturday you will probably be standing in a very long line the lenght depending on how many planes arrive before you. Our longest line ever anywhere is SJD arriving on Alaska Airlines at 1 pm. They have a line for arrivals that will amaze or stun you. You start to feel like the lines getting smaller until you make it through the terminal doors inside when you realize that you will be in a new serpentine line zig zaging throughout the terminal.
If your getting a rental car you could cruise around San Jose Del Cabo for awhile. If you have to wait at the airport it would kind of suck. If you do end up waiting you will have plenty of people wanting you to attend a TS presentation. It seems that anybody wearing a white collared shirt can set this up and it seems that everyone outside the terminal is wearing one. These people will tell you anything to get you to go on a TS presentation such as they are with Trans Cabo, Avis or anyone and anything your looking for. To make it more confusing some of these white collared shirt wearing people actually do work for the car rental companies and buses. What you want to do is get out front quickly and look around to see who is who. All of the people inside are probably working with the TS companies.
The timing might be that your only waiting 90 min instead 3 hours if your lines are way longer than your buddies but I think on Saturday your out of luck. If your arrival is Wednesday and most any other day besides Saturdays you will probably scoot right through.
No, there really isnt anything to do here but wait if you have to.