I just returned from a long-sought solo road trip, and I figured it might be of interest here, so I'll write a bit, as well as posting some photos.
Basically, I had two weeks, a general idea of what I wanted to see, and a Miata RF. It took two days on each end to reach the Mississippi River, which was my symbolic boundary between normal (east) and new (west). Though I've traveled a fair bit in the West before, I've always flown close to my destination. I've always wanted to see the country unfold in front of me, and this was my chance.
I'm still sort of processing the whole experience, so this will likely be a slightly disjointed, occasionally stream-of-consciousness sort of a thing, but in the meantime I can at least report on the car and show some pictures. The Miata (2021 ND RF GT 6spd) did very well. Just before I left, I installed a set of FM sway bars, which should frankly be mandatory on these cars; I knew they rolled a lot from the factory, but with the FM bars in I realized just how much. On full stiff they make the car feel a lot closer to what it should. Other than that, it's stock. Aside from needing to move my legs from time to time (cruise control to the rescue), the car was pretty comfortable, and I did numerous 500 mile days without any serious issues. Importantly, given current gas prices, I saw a trip average of 37.9mpg, with a best tank of 41.5 (pure highway in flat areas). I really have no complaints about the car at all; sure, it's not an ideal highway cruiser, but it didn't bother me enough to notice. Most of the time was spent with the top closed, as I was in the middle of a huge heat dome that saw temps over 100F for days on end, but it was nice to have the option to open it when the scenery called for it.
Anyway, here's a few more photos. I'll write a little more as it comes to me.