Agreed (about the flushable wipes). Only way to go if you can afford them.
Dunno what your options are in Pasadena (or the rest of the USA for that matter) are. Over here in South Africa: public toilets don't exist anymore (except on the beaches of coastal cities and you're more likely to get attacked or catch some weird tropical disease from putting your arse on the seat) so here, if you find yourself under extreme pressure (no pun intended), you're relegated to using toilets at filling stations (or best case scenario shopping centers) (or if you're really lucky enough to know to which hotel you can sneak into). At filling stations one of two things can happen i.e. either there's NO toilet paper or it's single ply (single ply coming with it's own shortcomings). And in most cases and even after a shit and having accidentally pushed your fingers through the single ply: the taps and basins are dirtier than your hands so there's not much point! Lol!
Sometimes you try get brave (usually after a long LONG business lunch) and try make it home in time. I've botched that twice in my life. You'd be surprised at how much shit (usually a mixture of garlic and peri-peri prawns, or shrimps as you may call them, and rum and Coke) you underwear can hold! You just have to exit the vehicle VERY slowly and carefully so as to not mess on the seat. But then again: as I understand it most Americans wear boxers so you'd be fucked i.e. it'd run down the legs, overflow from the shoes, and run all over the carpet in the car! Lol! And the real fun comes when you have to now undress very carefully so as to now not get shit everywhere in your own bathroom in order to have a shower i.e. at that point a bath is out of the question! Lol!