Hello, and welcome to the RTA Forum!

Your trip sounds like a blast; those 500+ mile days will be long, but not beyond the realm of reason, especially since you're not doing them back to back. Where I see an issue is using your Porsche to haul camping gear. Do you already have everything you plan to use, and have you tried packing it all into the limited space you have available? When I pack for a long solo trip that includes camping, I pretty well fill up the interior of a Grand Cherokee. But that's me.

The other issue with the Porsche, it's pretty darned low to the ground, made for paved roads. Most campgrounds, even in National Parks, involve unpaved sections of road. There could be issues with clearance. Since you're not doing this until next year, You might want to "test drive" your vehicle and your gear on a 3-4 day trip to somewhere in southern California--Joshua Tree, perhaps--before committing to a 6 week odyssey of the sort you've mapped out. See what works, and what doesn't.

Rick