I have a 100-lb, indoor, long haired-dog (1/2 Australian Shepherd) who will not get in the bathtub on his own and I can’t lift him. I try to put the front half in and then the back half, but he makes like a water balloon and it’s impossible for me. Usually, I bathe him in the driveway, even on warm days in the winter (Texas), using this awesome Y hose that hooks to the washing machine water spigots so I can use warm water. I have company coming for Christmas and the dog stinks. I have never thought of dry shampoo until now. Does it work? In addition to his BO, he also feels dirty so I don’t like petting him right now. Any brand recommendations?
We used one on a dog we fostered that tended to get stinky pretty fast. It was basically a spray-on, rub in and suds-up, wipe off type of thing. It sort of worked for a day or two, but was nowhere near similar whatsoever to an actual bath. Use it if you’re expecting company for a day or two and you really don’t want to bathe your dog, but not as a substitute for an actual bath.
These days we just drop our dog off at Petsmart for grooming once a month. They do the bath and nail trimming for $28 IIRC. Ours is a little 22-pounder though; your big guy would probably be more.
I don’t think there is any substitute for soap and water. Sorry. 
I would suggest biting the bullet and having a pro bathe him. Or, if one is available in your area, take him to a do-it-yourself dogwash of the type that has waist-high tubs with clip-on leads, warm water sprayers, shampoo dispensers, high speed low-heat dryers, etc. The staff will help you get him into the tub. Usually they have a ramp, too, if he will walk up it. That’s how I’ve been bathing my dogs, mostly goldens, for many years. Just great, and not expensive.
There is no DIY dogwash near my small town, although that would be ideal. I used to take him to a groomer during the winter, but it is 20 minutes away and I work full time so it is very difficult to get him there. I’m sure they are booked up this week anyway. It will be warmish on Thursday, but it’s nearly dark by the time I get home from work. I’m going to see if my son can come over and get him in the tub. He recently moved back to town and I always forget about him being here. It’s his dog anyway.
Your dog will probably (once it’s done) appreciate a good wash. I always think it must feel good to anyone to have a clean “coat”!!!
We bought some dry shampoo once which I thought might be good to “freshen him up” between tub washes. All I felt like it did was put a scent on his fur - like spraying a body mist. I didn’t feel like it did much else.
Our pup will get a bath at home this week. We will choose a warmer day and maybe do it it after his early evening walk so he has all night to dry.
I bathe him about once a month. I would like to do it every two weeks, but it’s hard on my old lady body, plus the weather doesn’t always cooperate on the weekends. I always tell him if he were little and I could carry him, he would get a bath every week. I’m sure he understands me. ha
^^^ Our vet told us that we shouldn’t bathe our beagle/corgi more than once a month -disturbs the natural oils in their skin/coat and can make them uncomfortably dry.
We use the shower and puppy shampoo. I get in and get quite soaked with our dog. H holds the shower door shut and has a dog treat ready at the end. Our dog is a 75 lb doodle mix. She seems to almost like it and is passive in the shower. The towels are used to dry her off. Sometimes she gets a little use of the hairdryer. I restrict her to an area of the house until she is dry. I use puppy shampoo so she doesn’t get any stinging in her eyes.
^ This is a high desert area. Make sure the water is warm not too hot or cold. It seems to relax her. We do it once a month. Don’t get water in the ears.
My H sometimes uses doggie wipes on our 9 year old lab. He gives him a good brushing and wipes him down. It takes off the surface dirt. When we got him as a puppy we tried bathing him and he would become so unmanageable that he could really damage someone’s shoulder or arm by trying to hold onto him. We tried attaching him to stationary objects with a leash and he broke them. We eventually gave up. He does some swimming in our pool during the summer but otherwise he never gets a bath. The amazing thing is he does not smell at all. His coat is shiny and he looks handsome.
This reminds me of the time my son decided to bathe our Labrador Retriever in the tub, something we’d never attempted. Our girl was also too heavy to lift over the side, but knowing that Labs will do anything for food, my son had a plan. I walked into the bathroom to see him sitting in the tub in a bathing suit, holding out a dog biscuit in each hand. Dog was standing on the bath mat, looking skeptical and bemused. And so they both remained. This was pre-iPhone era, or I’d have a priceless photo to memorialize the event.