Longest Boxster single day drive

[kk2002s]

For me the boxster's seat, left hip bolster, starts to pressure my left hip and then the discomfort starts after a few hours.

It's about $150 gas each way (About 37+ gals @ $4/gal)which is comparable with flying.
It's a little less then a 4 hour flight(If direct - but I doubt), time to get to and checkin before, after land time, then drive 1.5 hrs to destination - this turns in to 8-9 hours.
So driving 15 hours in a porsche isn't such a wacky idea

Besides I'm off my 12,000 miles a year this year due to weather and extra car. It's been sitting in the garage.
So I need to get back on track