You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I've had to wait a handful of times on my adventures around the country.
A Los Angeles location that I can't remember the name of had a line of a half dozen cars, so I left and went to a different station that was less than 10 minutes away ... not sure why people wait in some of these lines
Fort Drum, FL: turnpike location that was very busy on a Friday afternoon earlier this month. <10 minutes
Marathon, FL: 4-stall location that was pretty busy on a recent Saturday afternoon. <10 minutes
A few <5 minute waits at other random locations around the country