Check local laws first before putting up something. I know in some areas, putting up a storage tent may run afoul of "no camping" laws, and even an aluminum carport might need to have a building inspector and permit or else the city/county can fine or tear it down.
I like what Bobbo purchased -- an aluminum carport like that would be great here in Texas to protect against UV damage.
Plus, if it is aligned east/west, that is a large space one can install solar panels. Even a relatively small system could come in handy as a way to keep the batteries topped off in a rig while it is in storage. In hot weather like Texas, the solar array could power a couple vent fans so air that builds up in the center of the roof gets exhausted.
Of course, the carport is a starting point. Next comes the sewage "clean-out" (i.e. a dump station), a hose bib, and a power pedestal with a 50A, 30A, and two 20A receptacles.