Well, being blessed/cursed with a white dog, we wash him about once a season ( if he looks grayish and smells strongly doggy ).
We tether him to the back deck railing with his nylon leash, hose him down, shampoo with dog shampoo, rinse and let him shake shake shake!! Then a long walk in full sun finishes the drying. If cold weather, the hose is connected to kitchen sink for warm water ( $3 adapter ).
( I did think about bringing him in shower with me, but having no clothes and being in close quarters with a large animal that doesn’t really like baths...I felt nervous about that! Also thought he might slip on the slick shower floor, or get scared in the enclosed space. )
Rumo ~ rescue shepherd/husky mix