OP/others, I need some help understanding this. I'm confused by the line ..."the agent there can automatically attach the reservation to your existing booking". Which reservation? Did you mean to say that the agent there can ...attach your membership number to an existing reservation/booking (3rd party booked)? So say i use a 3rd party, AutoSlash or points through the CSP portal, can I then skip the line and get an executive car on the midsize rate and get it all worked out at the booth?