Well, you are trying to have you cake and eat it too. Maybe.
I remember as a kid, those **** trees thing my grandma’s beautiful 71 Buick Centurion.
Seems you’ve sort of painted yourself into a corner options wise.
But save for losing solar....do you need that anyway? Parked full time and no power?
I’d be thinking shade screen, like orchards use. They’re about $100. Make a gable frame out of pvc on your roof . I’d say use lumber but if you do you could probably buy the carport with lumber prices now!
Make a gable frame, drape shade cloth over it. Tie it down to underside of camper or stakes in the ground. Solves every issue save for getting solar