It's not the chaperone (whoever that may be) that is the issue.
No one can do as good a job as she can do herself.
Negotiations will continue.
Ed
PS - we tried an "Ed goes first and DW comes down a few days later" in a past trip to GSP. What should have been a 5-hr drive with step-by-step turns/instructions on a route we have literally travelled 20+ times (at least 2x for 10 yrs) turned out to be an 8-hr drive with the extra time (and stress) being my fault (of course

). So not a particularly popular option at my street address.
PPS - the alternative is that I leave GSP early in the AM to do a round-trip-in-a-day to get DW and bring her down. Or break it up with an overnight stay (which might work-late leave GSP, early leave home). Haven't thrown that out on the table yet.